Which diagram above shows a box in equilibrium

An automobile of mass 2000 kg moving at 30 m/s is braked suddenly with a constant braking force of 10000 n. how far does the car travel before stopping?

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

If a sphere and a cure have the same mass and are propelled up a ramp with the same force, which would travel father up the ramp? explain.