A 2 kg mass moving along a horizontal surface at 10 m/s is acted upon by a 5 N force of
friction. Calculate the net force?

Answer:

Explanation:

a) To calculate the deceleration of the car-driver, we can use the formula:

acceleration = (final velocity - initial velocity) / time

In this case, the initial velocity is 20 m/s, the final velocity is 0 m/s, and the time is 2 seconds. So, we have:

acceleration = (0 m/s - 20 m/s) / 2 s

acceleration = -10 m/s^2

The negative sign indicates that the deceleration is in the opposite direction of the initial velocity.

b) To calculate the force exerted on the car-driver, we can use Newton's second law of motion, which states that force is equal to mass times acceleration:

force = mass x acceleration

In this case, the mass of the car-driver is 60 kg, and the deceleration is -10 m/s^2 (as calculated above). So, we have:

force = 60 kg x (-10 m/s^2)

force = -600 N

The negative sign indicates that the force is in the opposite direction of the car-driver's initial velocity. This force is exerted on the car-driver by the seat and seat-belt, which are designed to restrain the car-driver and prevent them from flying forward due to the deceleration of the car.

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Answer:

6N

Explanation:

This is only if the force exerted on both sides is equal though.

Answer:

6n bc i  have the same question and btw what school u go to?

Answer:

Answer is a wave with the longest wavelength.

Explanation:

I hope it's helpful!

The height to which the ball rises is approximately 20.3 meters.

We can use the principle of conservation of energy to determine the height to which the ball rises. At the instant the ball leaves the foot, the total initial energy is the kinetic energy of the ball:

K_i = 1/2 * m * v_i^2

where m is the mass of the ball, and v_i is the initial velocity of the ball, which is 20 m/s. Substituting the given values, we get:

K_i = 1/2 * 0.45 kg * (20 m/s)^2 = 90.0 J

At the highest point of the ball's trajectory, its kinetic energy is zero, so all the initial energy has been converted into gravitational potential energy, given by:

U_f = m * g * h

where g is the acceleration due to gravity, which we take as 9.81 m/s^2, and h is the height to which the ball rises. Substituting the given values, we get:

U_f = 0.45 kg * 9.81 m/s^2 * h = 4.3965 h

Now we need to find the height h. To do this, we can use the principle of impulse and momentum, which states that the impulse of a force acting on an object is equal to the change in the object's momentum:

I = F * t = m * (v_f - v_i)

where I is the impulse of the force, F is the average resultant force acting on the ball, t is the time for which the force acts, and v_f is the final velocity of the ball, which is zero at the highest point of the ball's trajectory. Solving for v_f and substituting the given values, we get:

v_f = v_i - (F * t) / m

v_f = 20 m/s - (180 N * 0.050 s) / 0.45 kg

v_f = 2.2222 m/s

Now we can use the principle of conservation of energy to find the height h:

K_i = U_f

1/2 * m * v_i^2 = m * g * h

h = (1/2 * v_i^2) / g

h = (1/2 * (20 m/s)^2) / 9.81 m/s^2

h = 20.3 m

Therefore, the height to which the ball rises is approximately 20.3 meters.

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Answer:

900J

Explanation:

w =f×s

60×15

=900J

thus the k.e of the body is 900j

If force (F) 60N is applied over a distance(s) of 15m, the work done(W)by that force is 900joule.

if we applied an external force(F) to an object and that object gets displaced by some distance(s), Then the work done(W) by the force is given by the product of the applied force and the distance by which that object gets displaced.

Mathematically,

W=F×s

where W= Work done by the force in joule.

F= Applied force in newton.

s= Distance by which the object moved in meters.

Here in the question given

F=60N

s=15m

now work done (W)= F×s

                                 =60N×15m

                                =900N.m

                                 =900J

Hence the work done by the force 60N to move a body through a 15m distance is 900J.

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Abnormal forced extension beyond normal range of motion is called hyperextension.

To elaborate more, hyperextension is the forced extension of a joint beyond its normal range of motion.

The joint is forced into a position that is not its usual range of motion due to an external force or muscular activity.

Hyperextension often causes pain and discomfort in the affected joint and surrounding muscles.

Common sites of hyperextension include the neck, fingers, and knees.

In conclusion, hyperextension refers to an abnormal forced extension of a joint beyond its normal range of motion. Hyperextension may occur due to an external force or muscle activity, and it often causes pain and discomfort.

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Answer:

B. Solid rock breaks apart.

Explanation:

Answer:

B

Explanation:

I did it on a test lol

The force required to tip the cube is equal to the coefficient of static friction times the weight of the cube.

fx=μs * 87 kg * 9.8 m/s^2

Generally, The cube will start to tip when the net torque about the point of contact between the cube and the floor is equal to zero. The torque is given by:

torque = force x distance from axis of rotation

The distance from the axis of rotation is half the edge length of the cube (0.475m), and the force is the force applied by the person (). Therefore, the torque is:

torque = fx x 0.475

For the cube to tip, the torque due to the person's force must be greater than the maximum torque the friction can provide, which is the friction force times the distance from the axis of rotation.

The maximum torque provided by friction is:

friction torque = friction force x 0.475

Since the friction force is equal to the normal force (mg) multiplied by the coefficient of static friction (μs), the maximum torque provided by friction is:

friction torque = μs * mg * 0.475

where m is the mass of the cube, g is the acceleration due to gravity and μs is the coefficient of static friction between the cube and the floor.

So, we can find the force needed to tip the cube by equating the torque due to the force with that of the friction torque.

Fx*0.475 = μs * m * g * 0.475

Fx= μs * m * g

Fx= μs * 87 kg * 9.8 m/s^2

Note: The coefficient of static friction (μs) is a dimensionless quantity between 0 and 1, it varies depending on the surfaces in contact.

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To determine the experimental error, we need to compare the experimental value with the expected or theoretical value.

At STP (Standard Temperature and Pressure), 1 mole of gas occupies a volume of 22.4 L.

Experimental error can be calculated using the following formula:

Experimental error = |(experimental value - theoretical value) / theoretical value| x 100%

Substituting the values given:

Experimental error = |(21.4 L - 22.4 L) / 22.4 L| x 100%

Experimental error = |-0.0446| x 100%

Experimental error = 4.46%

Therefore, the experimental error is 4.46%.

Standard Temperature and Pressure (STP) is a standard set of conditions for experimental measurements of gases. The standard temperature is 0°C (273.15 K or 32°F), and the standard pressure is 1 atmosphere (atm) or 101.325 kilopascals (kPa).

At STP, 1 mole of an ideal gas occupies a volume of 22.4 liters (L). This is known as the molar volume of a gas at STP and is derived from the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:

PV = nRT

Where R is the gas constant. At STP, the values of P, V, and T are fixed, allowing us to calculate the number of moles of gas present (1 mole) and the volume occupied by that amount of gas (22.4 L).

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Under 14 CFR Part 91, a crewmember must wait at least 8 hours after consuming alcohol before acting as a crewmember of a civil aircraft.

No individual under the influence of alcohol may perform or try to act as a crewmember of a civil aircraft, in accordance with 14 CFR Part 91. A person may not work as a crew member of a civil aircraft within eight hours after ingesting alcohol, while impaired by alcohol, or while using any drug that impairs their ability to make decisions that are unsafe. The 8-hour "bottle-to-throttle" regulation was put in place by the FAA to make sure that crew members had enough time to get the alcohol out of their systems before flying an aircraft.

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Answer:

13.2 meter

Explanation:

because the initial velocity was zero

a) The three longest wavelengths for standing soundwaves in a 122-cm-long tube that is open at both ends are 2.44 m, 1.22 m,0.813 m.

b) The three longest wavelengths for a tube that is open at one end and closed at the other are 4.88 m, 2.44 m, 1.627 m.

To determine the three longest wavelengths for standing soundwaves in a 122-cm-long tube that is open at both ends, we can use the formula:

λ = 2L/n

where λ is the wavelength, L is the length of the tube, and n is the harmonic number.

By substituting the values, we can calculate the wavelengths:

λ1 = 2(122 cm)/1 = 244 cm  = 2.44 m

λ2 = 2(122 cm)/2 = 122 cm = 1.22 m,

λ3 = 2(122 cm)/3 ≈ 81.3 cm = 0.813 m.

Therefore, the three longest wavelengths in descending order are 2.44m, 1.22 m, 0.813m.

To determine the three longest wavelengths for a tube that is open at one end and closed at the other, we use the formula:

λ = 4L/n

Following the same process, we can calculate the wavelengths:

λ1 = 4(122 cm)/1 = 488 cm=4.88m

λ2 = 4(122 cm)/2 = 244 cm=2.44m

λ3 = 4(122 cm)/3 ≈ 162.7 cm=1.627m

Therefore, the three longest wavelengths in descending order are 4.88m, 2.44 m, 1.627 m.

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Principal axis or optical axis is a virtual line that passes through

the center of the lens.

A lens is a transmissive optical tool that employs refraction to focus or disperse a light beam. A compound lens is made up of numerous simple lenses that are often aligned along a common axis, as opposed to a simple lens, which is made up of a single transparent piece.

Principal axis the line between the optical center and the centers of curvature of a lens's or a curved mirror's faces. Any one of three axis that are mutually perpendicular and around which a body has its greatest moment of inertia.

Principal axis or optical axis is a virtual line that passes through

the center of the lens.

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Answer:

If one were to assume a circular orbit (actually earth orbit is slightly elliptical) then theta = 29.5 / 365.25 * 360 = 29 deg

The angle of the radius of the orbit would change by 29 deg in 29.5 days

Answer:

balanced hurry up fam

gurry hurry hurry

The time it takes for light from the Sun to reach Earth is roughly 8 minutes and 20 seconds. Once the light stops reaching our planet, we would quickly become aware of the Sun's absence, as the sky would turn dark and the temperature would begin to drop rapidly.

If the sun were to suddenly "go out", it would take about 8 minutes and 20 seconds for us to realize it. This is because light from the sun takes that long to travel to Earth. This means that we would still see the sun shining in the sky for those 8 minutes and 20 seconds after it had already gone out.

However, the sudden absence of sunlight would have immediate effects on our planet. Temperatures would drop rapidly, and all photosynthesis-dependent life on Earth would be in serious trouble. Plants would die off quickly, which would cause a ripple effect throughout the entire food chain.

The sudden absence of the sun would also have long-term effects on our planet's orbit and rotation. Without the gravitational pull of the sun, Earth's orbit would become unstable, and our planet's rotation would slow down over time.

In summary, it would take about 8 minutes and 20 seconds for us to realize that the sun had gone out, but the sudden absence of sunlight would have immediate and long-lasting effects on our planet.

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The reaction force in this scenario is the force exerted by the object on the Earth, which is equal in magnitude but opposite in direction to the action force (the force exerted by the Earth on the object).

According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In this case, the action force is the gravitational force exerted by the Earth on the object, which is equal to the product of the object's mass (m) and the acceleration due to gravity (g), represented as mg.

As a reaction to this action force, the object exerts a force on the Earth, known as the reaction force. The reaction force is of the same magnitude as the action force (mg), but it acts in the opposite direction.

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The time on the surface of an object would run most slowly on an object with the same mass as the Sun but twice as large in radius.

What is mass?

Mass is a measure of the amount of matter in an object and is typically expressed in kilograms (kg). It is an intrinsic property of matter and is different from weight, which is a measure of the force of gravity acting on an object. Mass is an important factor in determining the physical properties of an object, such as density, momentum, and inertia. Mass is also used to calculate the gravitational force between two objects, as well as the energy required to move it.

This is because the surface gravity of an object is inversely proportional to the square of its radius. Therefore, the object with the same mass as the Sun but twice as large in radius would have a much lower surface gravity, and time would run more slowly on its surface.

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Answer:

Hey there

When a white dwarf reaches 1.4 solar masses it implodes and becomes a neutron star. this mass limit is known as the "Chandrasekhar limit". It occurs when electron degeneracy pressure (the force that keeps the star from collapsing) is no longer strong enough to hold up aggainsed gravity.

Answer:

increases over time is the correct answer

Explanation:

Answer:

A

Explanation:

You did not list the options. However, knowing the possible options from having seen the material myself - I can infer that the answer option is A. I apologize sincerely if this is wrong.

The calculated values of E1 and E2, we can find the magnitude and direction of the total electric field at x=4.0 cm.

What is Magnitude?

Magnitude refers to the absolute value or size of a quantity, such as a scalar or vector quantity, without regard to its direction or sign. In physics, magnitude often represents the numerical value or measurement of a physical quantity, such as length, mass, time, temperature, electric field, or force, without considering its direction or orientation.

ote that the direction of electric field due to charge q1 at the origin (r1 = 0) will be radially outward from the origin, while the direction of electric field due to charge q2 at x=12 cm (r2 = 0.12 m) will be radially inward towards x=12 cm.

Step 4: Calculate the magnitude and direction of the total electric field at x=4.0 cm.

The magnitude of the total electric field (E_total) can be calculated as the magnitude of the vector sum of E1 and E2:

where Ex and Ey are the x and y components of the vector sum E_total.

To find the direction of the total electric field, we can determine the angle it makes with the positive x-axis:

θ = \(tan^{-1}\)(Ey / Ex)

Plugging in the values and calculating, we get:

Ex = E1 - E2 (since E1 is radially outward and E2 is radially inward)

Ey = 0 (since the electric fields are aligned along the x-axis)

θ = \(tan^{-1}\)(0 / (E1 - E2)) (direction angle)

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w= weight = mass x gravity

m = mass = 250 kg

g = gravity = 9.8 m/s^2

W = m x g = 250 x 9.8 = 2,450N

ΣFy = 0

W= Ty

2,450N = T cos 30

2,450 / cos 30 = T

T = 2,829 N

C.2832N

Arge-scale structure in the universe has probably been shaped primarily by the gravity of cluster matter is true.

The large-scale structure of the universe, such as the formation of galaxy clusters, superclusters, and cosmic filaments, is primarily shaped by the gravitational interactions of matter. Gravity acts as the dominant force in pulling matter together over cosmic scales, leading to the formation of structures on the largest observable scales in the universe. The gravitational attraction between matter, including dark matter, drives the clustering of galaxies into groups and clusters, which in turn contributes to the overall structure of the universe. Other factors, such as the expansion of the universe and the influence of dark energy, also play a role but gravity remains the primary force shaping the large-scale structure of the universe.

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Answer:

true

Explanation:

if all forces are equal then there would be no stronger force to give any net force so it would be zero

Answer:

A) earth

B) live

C) live

D) earth

Explanation:

hope i help