Question

A solid sphere starts from rest at the top of an incline of height $h$ and length $l$ and moves down. The force of friction between the sphere and the incline is $F$. The friction is insufficient to prevent slipping. The kinetic energy of the sphere at the bottom of the incline is $K$. Then

• A. The work done by the frictional force is $Fl$
• B. The heat produced is $Fl$
• C. $K=mgh-Fl$
• D. $K>mgh-Fl$

Answer 1

Answer: (A), (D)

The correct options are
A The work done by the frictional force is $Fl$
D $K>mgh-Fl$