A) Work done by frictional force is always negative B) A body at rest can have mechanical energy C) Mechanical energy of freely falling body decrease gradually

A) Work done by frictional force is always negative B) A body at rest

1.	A) Work done by frictional force is always negative B) A body at rest can have mechanical energy C) Mechanical energy of freely falling body decrease gradually
Answer» Only A is TRUE Only B is true Only C is true All the THREE are true Answer :B