Solve for velocity in A car has traveled 456 meters in 45 seconds while driving east on Broad Street. What is the velocity of the car?

The mass at the other end of bar will be 50g .

what is mass

It is the fundamental property of matter , every single property which exist in this world has mass

Mass never can be 0 .

So , the system is in equilibrium

let mass of the body be m

55×5= m×5.5

m= 5 5 × 5 /. 5.5

m= 5 0g



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137.5 kg mass can be placed 2m away from the other end of the bar to keep the bar horizontally.

To keep the bar horizontal, the right and left side torques must be equal:

\(F_{1} d_{1} =F_{2} d_{2}\)

\(F_{2} =F_{1} \frac{d_{1} }{d_{2} }\)

    \(=(55.9.8)\frac{5}{2}\)

    =1347.5 N.

Convert this force of gravity into mass:

\(F_{2} =m_{2} g,\)

\(m_{2} =\frac{F_{2} }{g}\)

     \(=\frac{1347.5}{9.8}\)

     =137.5 kg.

The answer is 137.5 kg.

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The equation for the position vector r(t) of the particle at time t is :r(t) = 3i + 8j + 8k + (7i + 0j + 0k)t + (5/2i + 1/2j - 2k)t²

Given,Initial velocity, v0= 7 m/s

Final velocity, v = ?

Acceleration, a= 5i + j - 4k

Time, t = ?

Distance between the points, d= √(8 - 3)² + (9 - 8)² + (4 - 8)²

                                                    = √25 + 1 + 16

                                                    = √42 m

We know that,v = v0 + at

On substituting the given values in the above equation, we get,

7 + a×t = v

⇒ v = 7 + (5i + j - 4k)×t

Now, the equation of motion can be given by the following equation,r(t) = r0 + v0t + 1/2at²

Here,r0 = (3i + 8j + 8k) is the initial position of the particle

On substituting the given values in the above equation, we get,

r(t) = 3i + 8j + 8k + (7i + 0j + 0k)t + (5/2i + 1/2j - 2k)t²

Hence, The particle's location vector at time t is represented by the equation:r(t) = 3i + 8j + 8k + (7i + 0j + 0k)t + (5/2i + 1/2j - 2k)t²

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Answer:

1)  10 kg-m/s

2)  2 kg

3)  20 m/s

Explanation:

The momentum of an object can be calculated using the equation:

\(\large\boxed{p=mv}\)

where:

\(\hrulefill\)

For this question we need to find the momentum of a bowling ball whose mass is 4.0 kg is rolling at a rate of 2.5 m/s.

Given values:

Substitute the given values into the momentum formula and solve for p:

\(p=4.0\;\text{kg} \cdot 2.5\;\text{m/s}\)

\(p=10\;\text{kg m/s}\)

Therefore, the momentum of the bowling ball is 10 kg-m/s.

\(\hrulefill\)

For this question we need to find the mass of a skateboard rolling at a velocity of 3.0 m/s with a momentum of 6.0 kg-m/s.

Given values:

As we want to find mass, rearrange the momentum formula to isolate m:

\(\large\boxed{m=\dfrac{p}{v}}\)

Substitute the given values into the formula and solve for m:

\(m=\dfrac{6.0\; \text{kg m/s}}{3.0\; \text{m/s}}\)

\(m=2\;\text{kg}\)

Therefore, the mass of the skateboard is 2 kg.

\(\hrulefill\)

For this question we need to find the velocity of a baseball with a mass of 0.5 kg and a momentum of 10 kg-m/s.

Given values:

As we want to find velocity, rearrange the momentum formula to isolate v:

\(\large\boxed{v=\dfrac{p}{m}}\)

Substitute the given values into the formula and solve for v:

\(v=\dfrac{10\; \text{kg m/s}}{0.5\; \text{kg}}\)

\(v=20\;\text{m/s}\)

Therefore, the velocity of the baseball is 20 m/s.

The given statement 'A positive magnification means the image is inverted compareed to the object' is false. Because when the image is virtual and erect then magnification is taken as positive.

The gas that makes up this layer is O3 (Ozone).

The ozone layer protects the earth from most of the sun's UVB rays. Greenhouse gases are a set of gases that accumulate in the lower layer of the atmosphere the troposphere and absorb infrared radiation to increase the average temperature of the Earth's surface. At the top of the stratosphere, 30 miles up, ozone absorbs most of the sun's harmful UV rays.

At the top of the troposphere 12 miles, up ozone acts as a greenhouse gas and traps heat. The troposphere is the lowest layer of the Earth's atmosphere. Most of the atmospheric mass is in the troposphere. Most types of clouds are in the troposphere, and almost all weather phenomena occur in this layer. Greenhouse gases are so named because they absorb infrared radiation from the sun in the form of heat which circulates in the atmosphere and is eventually lost to space.

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Answer:b

Explanation:

i just did the quiz i was look for it too then got it

The point on this graph do reactants begin to produce products as they collide is B.

The chemical reaction is the reaction between two reactants which led to the formation of products.

The products are substances which forms after reaction. The reactants are the substances which are original materials.

This graph shows how the reactants are reacted and products are formed in a chemical reaction.

As the reaction proceeds, the potential energy is higher when reactants begin to produce products.

Thus, the point on this graph do reactants begin to produce products as they collide is B.

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Answer:

Greater

Explanation:

The longer the handle the greater the mechanical advantage and the greater the increase in force that is applied to the bolt.

Mechanical advantage can be said to be the rate at which a particular force is multiplied.

This then means that there is a comparison between the output force and that of the input force.

The longer the handle gets, the more the mechanical advantage of the bolt and this also translates to it requiring lesser force being applied on it..

(a) The magnitude of the deceleration of each of the cars is a=f/m=μk mg/m=μkg. If a car stop in distance d , then its speed ν just after impact is obtained from Eq. 2−16 :

Since ν0=0 (this could alternatively have been derived using Eq. 8−31 ). Thus,

νA= \(\sqrt2μkgdA\) = \(\sqrt2(0.13)(9.8m/s 2 )(8.2m)\) =4.6m/s .  

(b) Similarly , νB= \(\sqrt2μkgdB\)= \(\sqrt(2(0.13)(9.8m/s2)(8.2m))\) =4.6m/s .

(c) Let the speed of car B be ν  just before the impact. Conservation of linear momentum gives

mB ν=mA νA + mB ​νB, or

ν= \(\frac{(mA νA + mB νB)}{mB}\)= \(\frac{(1100)(4.6)+(1400)(3.9)}{1400}\)=7.5m/s

Linear momentum, also known as momentum, is a vector quantity that describes the motion of an object. It is defined as the product of an object's mass and its velocity. The unit of momentum is kilogram meter per second (kg m/s). Linear momentum is a conserved quantity, meaning that the total momentum of a system of objects remains constant if no external forces act upon it. This principle is known as the law of conservation of momentum and it is a fundamental concept in classical mechanics.

The momentum of an object can be changed by applying a force on it, causing the object to accelerate. The greater the mass of an object and the faster it is moving, the greater its momentum. Understanding linear momentum is important in various fields including physics, engineering, and sports, where it is used to analyze the motion of objects and predict the outcome of collisions.

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Complete Question: -

In the before part of Fig. 9-60, car A (mass 1100kg ) is stopped at a traffic light when it is rear-ended by car B (mass  1400kg ). Both cars then slide with locked wheels until the frictional force from the slick road (with a low μ k of 0.13) stops them, at distances dA = 8.2m  and dB = 6.1m. What are the speeds of (a) car A and (b) car B at the start of the sliding, just after the collision? (c) Assuming that linear momentum is conserved during the collision, find the speed of car B just before the collision.

Answer:

300 kelvin

Explanation:

Answer:

a force is a movement on a object such as kinetic energy

Answer:

1.27551m

Explanation:

This is a simple energy convertion problem. Since there is no friction, and assuming no air drag and other external factors, mechanical energy should be conserved in this system.

Thus, we get:

\(KE_{initial} + PE_{initial} = KE_{final} + PE_{final}\)

We also know that the gravitational potential energy is equal to mgh, while the KE can be calculated using \(\frac{1}{2}mv^2\)

One thing to note here, is that the final KE will be 0, as there is no velocity at the end. Furthermore, we also can set the initial PE as 0 as we are looking at relative height, and at the start it is at h=0.

\(KE_{initial} = PE_{final}\)

Plugging in:

\(\frac{1}{2}*30*5^2 = 30*9.8*h\)

Solving for h, we get 1.27551m

Utilizing the idea that Ah distance triumphs over Parallax Thus, it is seven to one over a 10.772 at 1/0, 0.7. There will come a time. the cause. One parsec and how far apart are Aaron in age? Sec. One parsec is equal to 3.262 lightyears. Therefore, assuming 3.262 light years, it would take 4.23 years.

In astronomy, a parallax is the apparent movement of an object brought on by a shift in the observer's point of view. This is used to determine how far away neighboring stars are. A star's parallax reduces as its distance from us grows, and vice versa.

The parallax formula is expressed as:

d=1/p

Where:

In arcseconds, p equals the parallax angle.

d = the separation in Parsecs

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Answer:

In this lab, we used a virtual spectrometer to analyze the elements present in unknown astronomical objects. We observed that Moon One had hydrogen, helium, and carbon present, while Moon Two had hydrogen, helium, lithium, sodium, carbon, and nitrogen present. Planet One had hydrogen, helium, lithium, sodium, and carbon present, while Planet Two had hydrogen, helium, lithium, sodium, carbon, and nitrogen present.

It is essential to use many types of equipment when studying space because the electromagnetic spectrum is made up of many different wavelengths and frequencies, and each one provides different information. If carbon was the most common element found in the moons and planets, oxygen would be missing, which is necessary for the carbon cycle to occur. The electromagnetic spectrum helps us find out the make-up of stars by allowing us to detect the different wavelengths and frequencies of light they emit, which can tell us the elements they are composed of.

It is useful to determine the elements that a planet or moon is made up of because it can provide insight into the planet's atmosphere, climate, and potential for life. Knowing the elements present can also help us understand the history of the planet or moon, such as how it was formed and how it has evolved over time.

The resultant vector is 60.2 meter in a direction 48.6° North of west.

Resultant vectors are the product of the addition of two or more vectors.

The resultant vector is obtained by vector addition methods such as:

Considering the vector addition problem given:

Harry travels 40 meters east and then 45 meters south to catch the snitch in a quidditch match. At the same time, Voldemort who was 40 meters away, came racing 30 meters west towards Harry, then he went south of west at 25 degrees crashing into harry.

The resultant vector of both Harry and Voldemort are the same since the crashed into each other.

Using Harry's movement, the motion forms a right angle triangle of sides 40 m and 45 m

Using Pythagoras' rule:

R = √(40² + 45²)

R = 60.2 meter

α = tan⁻¹(40/45)

α = 41.6

θ = 90 - 41.6

θ = 48.6°

Therefore, the resultant vector is 60.2 meter in a direction 48.6° North of west.

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Answer:

Answer:

Direction - Downwards

Acceleration - Upwards

Explanation:

Terminal velocity means the net force was 0, so when the parachute is introduced the parachutist will feel an unbalanced force upwards thus being accelerated upwards. Still the motion is still going down as although there is an Acceleration upwards, it will take some time for it to accelerate enough to make the velocity 0

Answer:

in my opinion..

Answer:

PE = 64 J

m = 8 kg

g = 1.6 m/s2

h = 5 m

The Planet on its axis often contributes to the deflection created by the Coriolis force.

Moving objects in a reference point that rotates relative to an inertial frame are affected by an imagined or inertial force known as the Coriolis force. the force acting left of a object . an object in a frame of reference rotating in a clockwise direction.

Rotation: Rotation, often known as spin, is the cyclical motion of an object about a fundamental axis.

A two-dimensional rotating object can only have one possible central axis.

Such things have an axis that may rotate either counterclockwise or clockwise.

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We have the next data

vi=initial velocity=34.6 m/s

a=acceleration=-3.5 m/s^2

t=time=3s

we need to find the final velocity (vf)

We will use the next formula

then we substitute the data

then we isolate the vf

the velocity of the car after 3 seconds is 24.4 m/s

Insulators are often defined as materials that do not allow electricity to flow through them. Option A is correct. Electrons in an insulator do not move readily.

Insulators are commonly employed in physics. Insulators are often defined as materials that do not allow electricity to flow through them.

Insulators are also referred to as poor electrical conductors. We may discover various instances of these insulators in our daily lives. Insulators include materials such as paper, glass, rubber, and plastic.

Insulators are often defined as materials that do not allow electricity to flow through them. Electrons in an insulator do not move readily

Hence option A is correct. Electrons in an insulator do not move readily

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If the emission of the radiation occurs at 610 nm, 1.0 x 108 Hz are the uncertainties in frequency {av) and wavelength {al).

The uncertainty in frequency, Av, is given by the relationship Av = 1/At, where At is the uncertainty in time. The uncertainty in time, At, is equal to the mean lifetime of the electronically excited molecule, which is 1.0 x 10-8 s. Therefore, the uncertainty in frequency is:

= Av

= 1/(1.0 x 10-8 s)

= 1.0 x 108 Hz

The uncertainty in wavelength, Al, is given by the relationship Al = c*At, where c is the speed of light. The speed of light is approximately 299,792,458 m/s. Therefore, the uncertainty in wavelength is:

= Al

= 299,792,458 m/s * (1.0 x 10-8 s)

= 2.998 x 10-5 m

= 0.29982 mm

This is the uncertainty in the wavelength of the radiation emitted by the electronically excited molecule.

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Answer:

Machine; greater; thermal.

Explanation:

Conduction can be defined as the transfer of electric charge or thermal energy as a result of the movement of particles. When the conduction relates to electric charge, it is known as electrical conduction while when it relates to thermal energy, it is known as heat conduction.

In the process of heat conduction, thermal energy is usually transferred from fast moving particles to slow moving particles during the collision of these particles. Also, thermal energy is typically transferred between objects that has different degrees of temperature and materials (particles) that are directly in contact with each other but differ in their ability to accept or give up electrons.

Mathematically, the efficiency of a machine is given by the formula;

\( Efficiency = \frac {Mechanical \; advantage}{Velocity \; ratio} * 100 \)

Hence, the lower the efficiency of a machine, the greater the percentage of energy that is degraded to thermal energy. We experience inefficiency in machines due to the fact that energy are being transformed or converted from one form to another.

Answer:

C

Explanation:

If an electrical appliance becomes alive, the appliance continues working and is dangerous to touch

Answer:

v = -5 m/s

Explanation:

It is given that,

The initial velocity of the ball, u = 25 m/s

We need to find its velocity after 2 seconds in the air.

Let v is the velocity of the ball after 2 seconds. Using equation of motion to find it.

v = u + at

Here, a = -g

v = u -gt

Putting all the values,

v = 25 - (10)(3)

= 25-30

= -5 m/s

So, the velocity of the ball after 3 seconds is 5 m/s and it is in downward direction.

Changing the strength of the magnetic field changes the deflection pattern in the compass.

Magnetic field strength is also called as magnetic intensity or the magnetic field intensity. It is the part of the magnetic field in a material that arises from an external current and which is not intrinsic to the material itself. Magnetic field strength is expressed as the vector H and it is measured in the units of amperes per meter (A/m).

Increasing the strength of the magnet makes the compass deflect more due to increased magnetic field strength and decreasing the strength of the magnet makes the compass deflect less due to less intensity.

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Answer:

The mass of the cart-box system is now 20 kg (15 kg + 5 kg). The inertia of the cart-box system has also increased as the additional 5 kg box requires more force to move than just the 15 kg cart alone. So, the cart-box system has both greater mass and greater inertia than the cart alone.

Explanation:

Two points P and Q on a progressive wave are separated by distance d. The phase difference between P and Q is rad. The wavelength of the wave would be 8 times the distance between points P and Q.

In a progressive wave, the phase difference between two points is related to the wavelength of the wave. To find the wavelength (λ) given the phase difference (ϕ) and the distance (d) between two points, we can use the formula:

ϕ = 2π(d/λ)

Rearranging the equation to solve for λ, we have:

λ = (2πd) / ϕ

In this case, the phase difference between points P and Q is given as ϕ radians. The distance between these points is denoted by d. By substituting these values into the equation, we can determine the wavelength of the wave.

It's important to note that the phase difference is typically measured in radians, and one complete wave cycle corresponds to 2π radians.

For example, let's say the phase difference between points P and Q is π/4 radians, and the distance between them is d. Using the formula above, the wavelength would be:

λ = (2πd) / (π/4)

λ = (8πd) / π

λ = 8d

This calculation demonstrates how the phase difference and distance between points on a wave are related to the wavelength. By knowing the phase difference and distance, we can determine the wavelength of the wave using the formula derived from the wave's periodic nature.

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Answer:

f(x) = mx + b

Explanation: