A 2 kg toy car moves at a speed of 5 m/s. a. What is the kinetic energy of the car?

What object a collides with object b and bounces back its final momentum is?

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.

Which is a substance that can be separated by physical means and is not the same throughout