Laws Of Motion Mock Tests

A block slides down an inclined plane at 30° to the horizontal. If the coefficient of kinetic friction is 0.2, the acceleration of the block down the plane is: (g = 10 m/s², sin 30° = 0.5, cos 30° = 0.866)

A block slides down a frictionless incline of angle 45°. The acceleration of the block is (g = 10 m/s²):

A bullet of mass 10 g moving horizontally at 300 m/s strikes a stationary block of mass 90 g and gets embedded in it. The loss in kinetic energy of the system is:

A body of mass 1 kg moves in a circle of radius 1 m with constant speed 2 m/s. The centripetal force is:

A ball of mass 0.5 kg moving at 10 m/s collides with a wall and rebounds with the same speed. If the contact time is 0.1 s, the average force exerted by the wall is:

A particle of mass 2 kg moves in a circle of radius 0.5 m with an angular speed of 4 rad/s. The centripetal force acting on the particle is:

A block of mass m is placed on a smooth horizontal table. A vertical wall accelerates horizontally with acceleration a₀ toward the block. The block is connected to the wall by a spring of spring constant k and natural length L₀. When the block is in equilibrium relative to the accelerating wall, the compression in the spring is:

A block slides down a smooth inclined plane of angle 45°. The acceleration of the block is: (g = 10 m/s²)