Types of energy used with a racing car starting a race

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

If forces acting on an object are unbalanced. true or false