An object slides along a curved track of negligible friction, as shown in the figure. The potential energy U of the object as a function of the position x is shown in the graph. The object starts at rest at x=0. Which of the following is a correct claim about the motion of the object?
(Would prefer an explanation, but it's not necessary)
A) The kinetic energy of the object is approximately the same at x=2m and x=5m.
B) At x=2m, the object has more potential energy than kinetic energy.
C) The object comes to rest when x=5.5m.
D) The rate of change of the potential energy is a minimum at x=0m.
E) The object achieves its maximum speed at approximately x=3m.
Answers
Answer:
E) The object achieves its maximum speed at approximately x=3m.
Explanation:
Since the object is moving in gravitational field
potential energy + kinetic energy = constant = 14 J
At x = 3 m , potential energy is minimum that is zero
kinetic energy will be maximum .
Kinetic energy = 14 - 0 = 14 J
Hence option ( E ) is the answer.
Related Questions
object's velocity will not change unless it is acted on by a(n)
O net force.
O strong force.
O unbalanced force.
O opposite but equal force
Answers
Reasoning: Newton’s First Law of Motion (The Law of Inertia)
a type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. what force constant (in n/m) is needed to produce a period of 0.340 s for a 0.0200 kg mass?
Answers
According to the information available in the question, the force constant is 6.83N/m.
Using the relation;
T = 2π√m/k
T = period = 0.340 s
m = mass in kilograms = 0.0200 kg
k = spring constant = ?
Making k the subject of the formula;
k = 4π^2m/T^2
k = 4 × (3.142)^2 × 0.0200/(0.340 )^2
k = 4 × (3.142)^2 × 0.0200/(0.340 )^2
k = 6.83 N/m
In physics, force is that power that can change the motion of an item. It also can be described intuitively as a push or a pull. A force has both value and path, making it a vector quantity.
Force is a push or a pull and it affects our daily lives because, without force, people might not be capable of opening and near stuff or lifting up their arms or legs.
Variety of Forces :
* Frictional Forces
* Tension force.
* Spring force.
* Gravitational force.
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Energy can neither be created nor destroyed. Why?
Answers
Answer:
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside
8. An electron is accelerated from rest through a potential difference of 50.0 kV. What is the speed of the electron? (c = 3.00 × 108 m/s, e = 1.60 × 10-19 C, mel = 9.11 × 10-31 kg) A) 1.24 × 108 m/s B) 1.33 × 108 m/s C) 3.24 × 108 m/s D) 3.33 × 108 m/s E) 4.12 × 108 m/s
Answers
The speed of the electron is 1.33 * 10^{8} m/s
When an electron is accelerated through a potential difference, it gains kinetic energy. This energy can be calculated using the formula E = qV, where E is the energy gained, q is the charge of the electron, and V is the potential difference. In this case, the potential difference is given as 50.0 kV, which is equivalent to 50,000 volts. The charge of an electron is given as 1.60 × 10^-19 C. Therefore, the energy gained by the electron is:
E = (1.60 * 10^{-19} C) * (50,000 V) = 8.00 * 10^{-15} J
Using the formula for kinetic energy, KE = (\frac{1}{2})mv^{2}, where m is the mass of the electron and v is its speed, we can solve for v. Rearranging the formula, we get:
v = sqrt(\frac{(2KE)}{m})
Plugging in the values we have calculated, we get:
v = sqrt(\frac{(2 * 8.00 * 10^{-15} J) }{ 9.11 * 10^{-31} kg}) = 1.33 * 10^{8} m/s
Therefore, the answer is option B) 1.33 * 10^{8} m/s
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For Valentine’s Day, Sally received a helium-filled balloon at a party. On returning home she accidentally left the balloon in the car. Later she went to get the balloon and found it was partially deflated. After being in the house for an hour she noticed it was fully inflated again. Explain why this happened.
Answers
Answer:
If the temperature of the air in the balloon is less than the temperature of the air surrounding the balloon then the balloon will appear slightly deflated because of the difference in temperature.
As the temperature of the air in the balloon reaches the surrounding air temperature, then the balloon will appear to be fully inflated because the temperature of the air in the balloon is the same as the surrounding air temperature.
a ray of light is traveling in a glass cube that is totally immersed in water. you find that if the ray is incident on the glass-water interface at an angle to the normal greater than 51.9 ∘∘, no light is refracted into the water.
Answers
To summarize, if a ray of light is traveling in a glass cube immersed in water and strikes the glass-water interface at an angle greater than 51.9 degrees, no light is refracted into the water. Instead, it undergoes total internal reflection and remains in the glass.
When a ray of light travels from one medium to another, it can change direction. This phenomenon is called refraction. The angle at which the light ray strikes the boundary between the two media is called the angle of incidence. The angle between the incident ray and the normal (a line perpendicular to the boundary) is denoted as θ.
In this scenario, we have a glass cube completely surrounded by water. The incident ray of light is traveling in the glass cube and strikes the glass-water interface. If the angle of incidence is greater than 51.9 degrees (θ > 51.9°), no light is refracted into the water.
This happens because of the concept of total internal reflection. When the angle of incidence is larger than a critical angle (which is approximately 51.9 degrees for the glass-water interface), all of the light is reflected back into the glass. None of it enters the water.
To summarize, if a ray of light is traveling in a glass cube immersed in water and strikes the glass-water interface at an angle greater than 51.9 degrees, no light is refracted into the water. Instead, it undergoes total internal reflection and remains in the glass.
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A car is traveling with a velocity of 40. 0 m/s and has a mass of 1120 kg. How much kinetic energy does the car have?
Answers
Answer:
896 kj
Explanation:
KE= 1/2 mv^2 = 1/2 1120 40^2 =
calculate the speed of the disk in conceptual example 10-17 at the bottom of the inclined plane if the height of the incline is 0.55 m .
Answers
The speed of the cylinder at the bottom of the inclined plane is approximately 1.44 m/s.
To determine the speed of the cylinder at the bottom of the incline, we can use the conservation of energy principle, which states that the total mechanical energy of the system is conserved.
At the top of the incline, the cylinder has only potential energy, which is given by:
PE = mgh
where m is the mass of the cylinder, g is the acceleration due to gravity, and h is the height of the incline.
At the bottom of the incline, the cylinder has both kinetic energy due to its translational motion and rotational energy due to its spinning motion. The total kinetic energy is given by:
KE = (1/2)mv^2 + (1/2)Iw^2
where v is the linear speed of the cylinder, I is its moment of inertia, and w is its angular speed.
Since the cylinder rolls without slipping, we can relate v and w using the equation:
v = rw
where r is the radius of the cylinder.
The moment of inertia of a solid cylinder is given by:
I = (1/2)mr^2
Substituting these expressions for KE and I into the conservation of energy equation, we obtain:
mgh = (1/2)mv^2 + (1/2)(1/2)mr^2w^2
Simplifying and substituting v = rw, we get:
v = √(2gh/3)
Plugging in the given values, we get:
v = √(2 × 9.81 m/s^2 × 0.55 m/3)
≈ 1.44 m/s
Therefore, the speed of the cylinder at the bottom of the inclined plane is approximately 1.44 m/s.
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To calculate the speed of the disk in conceptual example 10-17 at the bottom of the inclined plane, we need to use the conservation of energy principle. The potential energy at the top of the incline is converted into kinetic energy at the bottom.
First, we need to calculate the potential energy at the top of the incline. The potential energy can be calculated using the formula:
PE = mgh
Where m is the mass of the disk, g is the acceleration due to gravity (9.81 m/s^2), and h is the height of the incline (0.55 m).
PE = (0.5 kg) x (9.81 m/s^2) x (0.55 m) = 2.7 J
This potential energy is converted into kinetic energy at the bottom of the incline, which can be calculated using the formula:
KE = 0.5mv^2
Where v is the speed of the disk at the bottom.
Since energy is conserved, we can set PE equal to KE:
PE = KE
2.7 J = 0.5(0.5 kg)v^2
Solving for v, we get:
v = sqrt(2.7 J / 0.25 kg)
v = 3.3 m/s
Therefore, the speed of the disk in conceptual example 10-17 at the bottom of the inclined plane is 3.3 m/s.
In the conceptual example 10-17, a disk rolls down an inclined plane. To calculate the speed of the disk at the bottom of the inclined plane with a height of 0.55 meters, we can use the conservation of mechanical energy principle. This principle states that the total mechanical energy (potential energy + kinetic energy) of the disk remains constant if no external forces are acting on it.
At the top of the incline, the disk has only potential energy (PE) due to its height, and no kinetic energy (KE) since it is not moving. As it rolls down, the potential energy is converted into kinetic energy (both translational and rotational).
The potential energy at the top is given by PE = m * g * h, where m is the mass of the disk, g is the acceleration due to gravity (approximately 9.81 m/s^2), and h is the height of the incline (0.55 m).
At the bottom of the incline, the disk has no potential energy, and its kinetic energy is a combination of translational (KE_t) and rotational (KE_r) components. The total kinetic energy is given by KE = (1/2) * m * v^2 + (1/2) * I * ω^2, where v is the linear velocity, I is the moment of inertia of the disk, and ω is the angular velocity.
Since the total mechanical energy is conserved, we can set the potential energy at the top equal to the kinetic energy at the bottom:
m * g * h = (1/2) * m * v^2 + (1/2) * I * ω^2
To solve for the linear velocity (v) at the bottom of the incline, we also need to know the mass of the disk, the moment of inertia, and the angular velocity. These values are not provided in your question. However, once you have this information, you can use the conservation of mechanical energy equation to find the speed of the disk at the bottom of the inclined plane.
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Twenty (20.0) mL of argon gas (Ar) is stored at STP. If the temperature and pressure are both doubled, what is the new volume?
PLZZ ANSWER ASAP!!
Answers
Answer:
The new volume is the same as the initial volume, i.e. 20 mL.
Explanation:
To find the new volume we can use the Ideal gas law:
\( PV = nRT \)
Where:
P: is the pressure
V: is the volume
R: is the gas constant
n: is the number of moles
T: is the temperature
Initially, we have:
\( \frac{P_{i}V_{i}}{T_{i}} = nR \) (1)
In the final state:
\( \frac{P_{f}V_{f}}{T_{f}} = nR \) (2)
By equating equation (1) and (2) we have:
\( \frac{P_{i}V_{i}}{T_{i}} = \frac{P_{f}V_{f}}{T_{f}} \)
\( \frac{P_{i}V_{i}}{T_{i}} = \frac{2P_{i}V_{f}}{2T_{i}} \)
\(V_{f} = \frac{2T_{i}*P_{i}*V_{i}}{T_{i}*2P_{i}}\)
\( V_{f} = V_{i} \)
\( V_{f} = 20.0 mL \)
Therefore, the new volume is the same as the initial volume, i.e. 20 mL.
I hope it helps you!
an atom with an overall negative charge is called?
Answers
Answer:
ANION is the answer
What is the product of a male and a female parent 
Answers
This is true for most sexually reproducing organisms, including humans. The male parent provides sperm which contains half of the genetic information (or chromosomes) necessary for reproduction, and the female parent provides an egg which also contains half of the necessary genetic information. When the sperm and egg combine during fertilization, they form a new organism with a unique combination of genetic traits inherited from both parents.
identify the type of each genetic disorder this is science
Answers
Cystic fibrosis is a recessive genetic disorder caused by a mutation in the CFTR gene. It affects the lungs, pancreas, and other organs, causing difficulties in breathing and digestive problems.
Hemophilia is an X-linked recessive genetic disorder that affects blood clotting due to mutations in clotting factor genes. Hemophilia A is caused by a mutation in the F8 gene while hemophilia B is caused by a mutation in the F9 gene.
Duchenne muscular dystrophy is an X-linked recessive genetic disorder caused by mutations in the DMD gene, which codes for a protein called dystrophin. It affects muscle function and leads to muscle weakness and wasting.
Huntington's disease is an autosomal dominant genetic disorder caused by a mutation in the HTT gene. It affects brain function, leading to psychiatric symptoms and movement problems.
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Cystic fibrosis - autosomal recessive pattern, Hemophilia - X-linked recessive pattern, Duchenne muscular dystrophy - X-linked recessive pattern and Huntington's disease - autosomal dominant pattern.
Can genetic conditions be treated?Gene alterations that are essentially present in every cell in the body cause many hereditary diseases. These illnesses thus frequently impact many bodily systems, and the majority cannot be treated. To treat or manage some of the accompanying symptoms, there might be methods available.
An X-linked recessive pattern: what is it?Genetic disorders connected to mutations in genes on the X chromosome are referred to as having X-linked recessive inheritance. Because he contains just one X chromosome, a male who carries this mutation will be affected. A female who carries a gene mutation in one X chromosome but has a normal gene on the other X chromosome usually has no symptoms.
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which of the following are fire preventions guidelines
Answers
Answer:
there is no list of "the following" you might want to re-upload your question.
One person shouts "Gone to Texas." If now 100 shout it then
Group of answer choices
A: The sound is 10 decibels higher.
B: The sound is 20 decibels higher.
C: The sound is 100 decibels higher.
D: The sound is 100 times as many decibels.
E: The sound is loud enough to make people's ears explode.
Answers
The sound intensity level would increase by 20 decibels if 100 people shout instead of one. Hence option B is correct.
The sound intensity level (SIL) increases by 10*log(N), where N is the number of people shouting. With the help of this equation, we can determine the rise in SIL as follows: N₁ = 1 (one person shouting) and N₂ = 100 (100 people shouting) simultaneously,
ΔSIL = 10log(N₂/N₁)
ΔSIL = 10log(100/1)
ΔSIL = 10*2
ΔSIL = 20 dB
Therefore, the answer is B that says "The sound is 20 decibels higher".
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A train travels 4200 km in 90 hours. What is its speed?
Answers
Answer: I think its 120
Explanation: thx for the free points :)
what is the speed of light at 15°c
Answers
Answer:
calculation presented a speed of 125,000 miles per second (200,000 km/s).
Explanation:
Explain how series circuits use current and voltage and Explain how parallel circuits use current and voltage
Answers
'''In a series circuit, the sum of the voltages consumed by each individual resistance is equal to the source voltage. Components connected in parallel are connected along multiple paths so that the current can split up; the same voltage is applied to each component.''
Inertia is ______ to mass.
Answers
Answer:
Inertia is directly proportional to mass of an object. Therefore, when the force of inertia increases the mass also increases, and when it decreases the mass also decreases.
Explanation:
Answer: Inertia is _ directly proportional_ to mass.
Explanation:
A wire is placed between the poles of a horseshoe magnet. There is a current in the wire in the direction shown, and this causes a force to act on the wire.
Answers
What happens when a mixture is separated
A) A substance is lost
B) A new substance is formed
C) The substances stay the same
D) The mass of the substances change
Answers
Answer:
the answer would be c
Explanation:
Which of the following is an example of a primary source?
Answers
Answer:
An article written by a scientist .
Explanation:
Primary sources information are those that contain first hand information probably from the place of the activities or by the original contact of the information (source ) .
So primary information is normally contained in artifact , journals , letter , dissertations manuscripts , videos and audio recordings .
The fact that the article is written by the scientist means he is the one who has the original information hence he is the first person to access the information , meaning he is the original owner .
The force pulling the moon toward Earth depends on the mass of the two bodies and which factor?.
Answers
Which language has the most native speakers?
a.
Spanish
b.
Hindi
c.
Mandarin
d.
English
Please select the best answer from the choices provided
A
B
C
D
Answers
Answer:
c
Explanation:
in the graph, mandarin has the highest amount of speakers
Answer:
English
Explanation:
this is because wants to know how to speak in English
The best time to get my RESTING HEART RATE is right after I run.
true or false
Answers
Answer:
Your answer is: False
It is called a resting heart rate for a reason : )
Explanation:
Hope this helped : )
Answer: false
Your resting heart beat is when your heart beat is resting or calmed down. After you run, your heart is not so calmed. The answer is false.
develop a hypothesis about the relationship between an object's mass and its weight
Answers
Answer:
Mass = Size, Weight = Heaviness
Explanation:
Mass is how much matter that is in an object
Weight is a measurement that indicates how heavy something
Marshall paddled his kayak 919meters across a lake at a constant velocity. He moved that distance in 10. 0minutes. What was his velocity?
Answers
Marshall's velocity while paddling his kayak across the lake was 1.53 meters per second, which can be calculated by dividing the distance he traveled by the time it took him to cover that distance.
Marshall's velocity can be calculated using the formula:
velocity = distance/time
Where distance is 919 meters and time is 10.0 minutes, which must be converted to seconds:
time = 10.0 minutes = 600 seconds
Substituting these values, we get:
velocity = 919 meters / 600 seconds
velocity = 1.53 meters per second
Therefore, Marshall's velocity was 1.53 meters per second.
To explain this, we can say that velocity is the rate of change of displacement over time, and in this case, Marshall traveled a distance of 919 meters over a period of 10.0 minutes.
By dividing the distance by the time, we can calculate his velocity, which tells us how fast he was traveling in meters per second.
In summary, Marshall's velocity while paddling his kayak across the lake was 1.53 meters per second, which can be calculated by dividing the distance he traveled by the time it took him to cover that distance.
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PLEASEE HELP!!!!!!Why are the youth not getting involved in their communities and voting? How is media influencing the voters?
Answers
Answer:
because they are underaged and prob dont care and also the gov thinks that the youth cant make a reasonable decision for them selves for sum like that and the media influnces them to by saying whats going on and who supports who
2. A Canada goose flies at 250 km in 2.2 hours with a gusty, on/off, variable tailwind during its flight.
What is the speed of this goose in mi/h?
Note Problem 2 : Canada geese can travel 1,500 miles in a day if the weather permits. These birds tend to fly around 40 miles per hour during migration, they can travel up to 70 miles per hour if they catch a strong gust or tailwind (push) during the flight.
Answers
The speed of the Canada goose in mi/h would be 70.61 mi/h.
What is speed?The speed of a moving object or organism is the ratio of the distance traveled and the time taken. The total distance traveled and the total time taken for a journey is otherwise known as average speed.
In this case, the distance covered by the goose is 250 km and the total time spent covering this distance is 2.2 hours.
Thus: speed = distance/time
= 250/2.2
= 113.64 km/h
In order to find the speed in mi/h, we first need to convert the total distance covered from km to mile.
1 mile = 1.60934 km
Thus, 250 km = 250/1.60934
= 155.34 miles
Thus, the speed of the goose in miles per hour:
= 155.34/2.2
= 70.61 mi/h
In other words, the speed of the Canadian geese in mi/h would be 70.61 mi/h.
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a car moving at a steady 10 m/s on a level highway encounters a depression that has a circular cross-section with a radius of 30 m. the car maintains its speed as it drives through the depression. what is the normal force exerted by the seat of the car on a 60 kg passenger when the car is at the bottom of the depression?
Answers
To calculate the normal force exerted by the seat of the car on the passenger when the car is at the bottom of the depression, we need to consider the forces acting on the passenger.
At the bottom of the depression, the passenger experiences an inward net force directed towards the center of the circular path. This force is provided by the normal force exerted by the seat. To determine the normal force, we need to consider the centripetal force acting on the passenger.
The centripetal force can be calculated using the formula:
F_c = m * a_c
where F_c is the centripetal force, m is the mass of the passenger, and a_c is the centripetal acceleration.
The centripetal acceleration is given by:
a_c = v² / r
where v is the velocity of the car and r is the radius of the circular depression.
Given:
Velocity of the car (v) = 10 m/s
Radius of the depression (r) = 30 m
Mass of the passenger (m) = 60 kg
First, we calculate the centripetal acceleration:
a_c = (10 m/s)² / 30 m = 100 m²/s² / 30 m = 10/3 m/s²
Now, we can calculate the centripetal force:
F_c = (60 kg) * (10/3 m/s²) = 200 N
Since the normal force exerted by the seat is equal to the centripetal force, the normal force is 200 N. Therefore, the normal force exerted by the seat on the 60 kg passenger at the bottom of the depression is 200 N.
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Spring tides occurs at two of the time shown which two? how do u know ?
Answers
Spring tides are extremely wide ranges of tidal highs and lows that occur during full moon or new moon phases when the gravitational forces of the Sun and Moon are at their strongest.
Neap tides are characterized by lower high tides and higher low tides, while spring tides feature higher high tides and lower low tides. Because of this, a spring tide has a significantly wider range than a low tide (the difference in water level between high and low tide).Spring tides are the tides that occur right after a new or full moon when the difference between high and low water is the biggest. The earth, moon, and sun are in a straight line at this time, causing the gravitational pull to be at its strongest. There are more high tides than usual and fewer low tides than usual.To know more about spring tides
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