A 1400 kg car moving at 20 m/s collides with an 1100 kg car in front of it moving at 15 m/s. If the 1400 kg car moves at 17.5 m/s after the collision,

Avalue that describes how heavy an object is and is related to the force of gravity is

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n