A body of 4 kg mass placed on a smooth horizontal surface experiences a force varying with displacement of block as shown in figure-3.7. Find the speed of the body when force ceases to act on it.

A body of mass 5kg is acted upon by a variable force. The force varies with the distance covered by the body as shown in figure. What is the speed of the body when it has covered 25m ? Assume that the body starts from rest.

A box of mass m=2 kg resting on a frictionless horizontal ground is acted upon by a horizontal force F, which varies as shown. Find speed of the particle when force ceases to act.

A box of mass m=2 kg resting on a frictionless horizontal ground is acted upon by a horizontal force F, which varies as shown. Find speed of the particle when force ceases to act.

A body of mass 2 kg is rest on a smooth horizontal surface . When a horizontal force of 0.5 N acts on this bofy it is displaced in the direction of the force . Find the work done by the force in 8.0 s .Show that this work is equal to the change in kinetic energy of the body .

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,

Two blocks of masses 7 kg and 3 kg are connected by a spring of stiffness 1000Nm^(-1) and placed on a smooth horizontal surface. They are acted by horizontal forces of 72 N and 32 N in opposite directions as shown in the figure. When accelerations of the blocks are equal and constant, the extension of the spring 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