What vehicle has the greatest kinetic energy the bike or two cars

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.

An object's buoyant force and weight mean the same thing. a. trueb. false

Boiling water is an example of physical change. true or false