Consider a compact car that is being driven at 111 km/h.
The acceleration of gravity is 9.8 m/s^2
From what height would the car have to be
dropped to have the same kinetic energy?
Answer in units of m.

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?

Arock displaces 1.65 l of water. the volume of the rock is: a: 1,650 cm³ b: 165.0 cm³ c: 16.50 cm³ d: 0.165 cm³

What caused magnetic fields? what happens if you keep breaking a magnet in two until you reach a single atom?