(A) : In the given Fig . 7 . 184 , a force20 N pulls a block of mass 10 kg on a rough floor . If coefficient of friction is mu = 0.4 , force of friction acting on the block will be 20 N. (R) : Force of kinetic friction is slightly less than the limiting value of force of friction .

(A) : In the given Fig . 7 . 184 , a force20 N pulls a block of mass 1

1.	(A) : In the given Fig . 7 . 184 , a force20 N pulls a block of mass 10 kg on a rough floor . If coefficient of friction is mu = 0.4 , force of friction acting on the block will be 20 N. (R) : Force of kinetic friction is slightly less than the limiting value of force of friction .
Answer» If both A and R are true and R is the correct explanation of A . If both A and R are true but R is not correct explanation of A . If A is false but R is false . If A is false but R is true ANSWER :B