A time varying for `F=10 sqrt(2) t` starts acting on the 3 kg block lept on a rough horizontal surface `(mu=0.2)` at `t=0`. Find
(a) the moment of time when the blocks leaves the surface
the moment of time when the horizontal motion begins.

A block is sliding on a rough horizontal surface. If the contact force on the block is sqrt2 times the frictional force, the coefficient of friction is

A block is kept on a rough horizontal surface as shown. Its mass is 2 kg and coefficient of friction between block and surface (mu)=0.5. A horizontal force F is acting on the block. When

At the instant t=0 , a force F=kt (k is a constant) acts on a small body of mass m resting on a smooth horizontal surface. The time, when the body leaves the surface is

A time varying force F = 5t is applied on a block kept on a rough horizontal surface. Mass of block is 10 kg, coefficient of static and kinetic friction between block and horizontal surface are 0.3 and 0.2 respectively. Take g = 10 m//s^(2) Find the time at which slipping starts between block and the surface beneath it.

Two blocks A and B of masses 10 kg and 15 kg are placed in contact with each other rest on a rough horizontal surface as shown in the figure. The coefficient of friction between the blocks and surface is 0.2. A horizontal force of 200 N is applied to block A. The acceleration of the system is ("Take g"=10ms^(-2))

A block of mass 70kg is kept on a rough horizontal surface (mu=0.4) . A person is trying to pull the block by applying a horizontal force, but the block is not moving. The net contact force exerted by the surface on the block is F , then:

A block is placed on a rough horizontal plane. A time dependent horizontal force F=K t acts on the block K is a postive constant. Accelration-time graph of the block is

A block is placed on a rough horizontal plane. A time-dependent horizontal force F=kt^(2) acts on the block. Here k is a positive constant. Acceleration -time graph of the block is

A force F=2t is spplied at t=0 sec to the block of mass m placed on a rough horizontal surface. The coefficient of static and kinetic friction between the block and surface are mu_S and mu_k rspectively. Which of the following graphs best represents the acceleration vs time of the block (mu_Sgtmu_k) ?