Friction Test -...

On the horizontal surface of a truck, a block of mass 1 kg is placed (µ = 0.6) and truck is moving with an acceleration of 5 m/s², then the frictional force on the block will be—

A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless

pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g = 10 m/s²)—

A light string passing over a smooth light pulley connects two blocks of masses m₁ and m₂ (vertically). If the acceleration of the system is (g/8), then the ratio of masses is—

A cylinder rolls up an inclined plane, reaches some height and then rolls down (without slipping through these motion). The direction of the frictional force acting on cylinder are

A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift and a man standing stationary on the ground are respectively.

A man weighs 80kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 m/s². What would be the reading on the scale.

In a gravity free space, a man of mass M standing at a height h above the floor, throws a ball towards the ground. When the ball reaches the floor, the distance of the man above the floor will be:

A car starts from rest to cover distance s. The coefficient of kinetic friction between the road and tire is μ. The minimum time in which the car cover the distance s is proportional to

A car starts from rest and moves on a surface in which the coefficient of friction between the road and the tyres increases linearly with distance (x). If the car moves with the maximum possible acceleration, the Kinetic energy (E) of the car will depend on x as:

In the Figure, the ball A is released from rest when the spring is at its natural length. For the block B, of mass M to leave contact with the ground at some stage, the minimum mass of A must be: