A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth,level floor.A horizontal force of 32 N is exerted on the 5.0-kg box pushing it against the 3.0-kg box,and,as a result,both boxes slide along the floor.How hard do the two boxes push against each other?
A)12 N
B)20 N
C)24 N
D)32 N
E)0 N

Question

Quizplus · Accepted Answer

The acceleration of the system is 32 N / (3.0 kg + 5.0 kg) = 4 m/s². The force exerted by the 5.0-kg box on the 3.0-kg box is 3.0 kg * 4 m/s² = 12 N.

A 30-Kg and a 5