(A) : Work done in moving a body of mass .m. on a horizontal surface of coefficient of friction mu along semi circular path of radius .r. by friction is pi mu mgr.(R ) : Friction always opposes relative motion.

(A) : Work done in moving a body of mass .m. on a horizontal surface o

1.	(A) : Work done in moving a body of mass .m. on a horizontal surface of coefficient of friction mu along semi circular path of radius .r. by friction is pi mu mgr.(R ) : Friction always opposes relative motion.
Answer» Both (A) and (R ) are TRUE and (R ) is the CORRECT EXPLANATION of (A) Both (A) and (R ) are true and (R ) is not the correct explanation of (A) (A) is true but (R ) is false (A) is false and (R ) is false Answer :A