A block of mass 4 kg is kept on ground. The co-efficient of friction between the block and the ground is 0.80. an external force of magnitude 30 N is applied parallel to the ground. The resultant force exerted by the ground on the block is `(g=10m//x^(2))`

A block A of mass 4 kg is kept on ground. The coefficient of friction between the block and the ground is 0.8 . The external force of magnitude 30 N is applied parallel to the ground. The resultant force exerted by the ground on the block is (g = 10 m//s^(2)) a) 40 N b) 30 N c) zero d) 50 N

A block A of mass 4 kg is kept on ground. The coefficient of friction between the block and the ground is 0.8 . The exernal force of magnitude 30 N is applied applied parallel to the ground. The resultant force exernal by the ground on the block is (g = 10 m//s^(2))

On a smooth horizontal surface a block A of mass 10kg is kept. On this block a second block B of mass 5kg is kept. The coefficient of friction between the two blocks is 0.4 .A horizontal force of 30N is applied on the lower block as shown. The force of friction between the blocks is

A rectangular block of mass 5 kg is kept on a horizontal surface . The coefficient of friction between the block and the surface is 0.2 . If a force of 20 N is applied to the block at angle of 30^(@) with the horizontal plane , what is the force of friction on the block ? (Take g = 10 m//s^(2) )

In the previous problem. The friction force applied by ground on block B is

In the previous problem. The friction force applied by ground on block B is

A block of mass 4 kg is kept on a rough horizontal surface. The coefficient of static friction is 0.8. If a force of 19 N is applied on the block parallel to the floor, then the force of friction between the block and floor is

A block of mass 4 kg is kept on a rough horizontal surface. The coefficient of static friction is 0.8. If a forace of 19 N is applied on the block parallel to the floor, then the force of friction between the block and floor is

A boy of mass 50 kg standing on ground exerts a force of 500 N on the ground. The force exerted by the ground on the boy will be :