A block of mass 4kg is at rest on a rough horizontal surface. A horizontal force of 20N when applied on the body, increases its velocity to 5m/s in 4 sec. Then the frictional force acting on the block is

A block is placed on a rough horizontal plane. Three horizontalforces are applied on the block as shown in the figure. If the block is in equilibrium, find the friction force acting on the block.

A block of mass 10 kg is placed on a rough horizontal surface of coefficient of friction 0.1. A pulling force of 100 N acts on it at 37^(@) with the horizontal. The frictional force acting on the body is ..... N.

A block of unknown mass is at rest on a rough, horizontal surface. A horizontal force F is applied to the block. The graph in the figure shows the acceleration of the block with respect to the applied force. The mass of the block is

A body of mass 2kg is placed on a horizontal surface having kinetic friction 0.4 and static friction 0.5 . If the force applied on the body is 2.5N , then the frictional force acting on the body will be

A block of mass 20kg is placed on a rough horizontal plane and a horizontal force of 12N is applied. If coefficient of friction is 0.1 the frictional force acting on it is,

A block of mass 2 kg rests on a horizontal surface. If a horizontal force of 5 N is applied on the block, the frictional force on it is ("take", u_(k)=0.4, mu_(s)=0.5)

A body of mass 10 kg lies on a rough horizontal surface. When a horizontal force of F newtons acts on it, it gets an acceleration of 5 m//s^(2) . And when the horizontal force is doubled, it gets an acceleration of 18 m//s^(2) . The coefficient of friction between the body and the horizontal surface is

A body of mass 5 kg is at rest on a smooth horizontal surface. A horizontal force 'F' acts on it for 4s and then ceases to act. If the body travels 40 m in the next 5s, the value of F 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 block of mass 1 kg in kept on a rough horizontal surface with mu_(s)=0.1 . A force of 0.5 N is applied as shown in the figure. What is the frictional force applied by ground on the block?