(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 res

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