PROBLEM 3 3 A crate whose mass m is 360 kg rests on the bed

Last updated: 6/19/2023

PROBLEM 3 3 A crate whose mass m is 360 kg rests on the bed of a truck that is moving at a speed vo of 105 km h The driver applies the brakes and slows to a speed v of 62 km h in 17 s What force assumed constant acts on the crate during this time Assume that the crate does not slide on the truck bed Solution We first find the constant acceleration of the crate Solving Eq 2 26 Vx Vox axt for a yields km h km h s h s ax Vx Vox t V V x a t X Ox Convert velocity in km h to velocity in m s by multiplying V by 10 3600 m s In the above equation substitute Vx 62 km h Vo 105km h and t 17 sec and calculate a The force FCT exerted on the crate by the truck follows from Newton s second law FCT max kg m s Substitute for m 360 kg and a and calculate as above m s N