Question

which of the following energy change involves frictional force (a) chemical energy to heat enegy (b) kinetic energy to heat energy (c) potential energy to sound energy (d) chemical energy to kinetic energy. Give reaaons for your answer.

Answer 1

b) kinetic energy to heat energy.
during frictional force the objects which undergo the force are in motion due to which they possess kinetic energy. also in most of the cases objects come in contact with each other which generates heat energy between them.

hope it helps ...

Answer 2

kinetic energy to heat energy.
during frictional force the objects which undergo the force are in motion due to which they possess kinetic energy. also in most of the cases objects come in contact with each other which generates heat energy between them.

hope it helps ...