Use the work-energy theorem to determine the force required to stop a 1000 kg car moving at a speed of 20.0 m/s if there is a distance of 45.0 m in which to stop it.

4.44 kN in the opposite direction of acceleration.

Explanation:

Given that, the initial speed of the car is,

And the mass of the car is,

The total distance covered by the car before stop,

And the final speed of the car is,

Now initial kinetic energy is,

Substitute the value of u and m in the above equation, we get

Now final kinetic energy is,

Substitute the value of v and m in the above equation, we get

Now applying work energy theorem.

Work done= change in kinetic energy

Therefore,

Here, the force is negative because the force and acceleration in the opposite direction.

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation: