Force Test - 9...

When a constant force is applied to a body, it moves with uniform

When a force of constant magnitude always acts perpendicular to the motion of a particle, then

A body of mass 2 kg moving on a horizontal surface with an initial velocity of 4 m/s comes to rest after 2 seconds. If one wants to keep this body moving on the same surface with a velocity of 4 m/s, the force required is

A vehicle is moving on a track as shown in figure. The weight of the vehicle is

A surface is hit elastically and normally by n balls per unit time. All the balls have the same mass m and moving with the same velocity u. The force on the surface is

A rocket is ejecting 1 kg of gases per sec at a velocity of 60 km/s. The accelerating force on the rocket is

A block of metal weighing 2 kg is resting on a frictionless plane. It is struck by a jet releasing water at a rate of 1 kg/s and at a speed of 5 m/s. The initial acceleration of the block will be

A ball weighing 10 g hits a hard surface vertically with a speed of 5 m/s and rebounds with the same speed. The ball remains in contact with the surface for (0.01) sec. The average force exerted by the surface on the ball is

A projectile is moving at 60 m/s at its highest point, where it breaks into two equal parts due to an internal explosion. One part moves vertically up at 50 m/s with respect to the ground. The other part will move at

A light particle moving horizontally with a speed of 12 m/s strikes a very heavy block moving in the same direction at 10 m/s. The collision is one-dimensional and elastic. After the collision, the particle will

A bullet of mass `a` and velocity `b` is fired into a large block of wood of mass `c`. The final velocity of the system is

Two skaters A and B of masses 50 kg and 70 kg, respectively stand facing each other 6 m apart. Then, they pull on a rope stretched between them. How far has each moved when they meet?

Two blocks of masses 2 kg and 1 kg are in contact with each other on a frictionless table. When a horizontal force of 3.0 N is applied to the block of mass 2 kg, the value of the force of contact between the two blocks is

A string of length L and mass M is lying on a horizontal table. A force F is applied at one of its ends. Tension in the string at a distance x from the end at which force is applied is

Two bodies of masses 5 kg and 4 kg are arranged in two positions as shown in figures (1) and (2). If the pulleys and the table are perfectly smooth and pulleys are massless, what will be the acceleration of the 5 kg body in both cases (1) and (2)?

A spring obeys Hooke's law. When loaded with 12 g, its extension is 2 cm. Which of the following will produce a 3 cm extension? (g = 10 m/s²)

A block A of mass 2 kg rests on another block B of mass 8 kg, which rests on a horizontal floor. The coefficient of friction between A and B is 0.2, while that between B and floor is 0.5. When a horizontal force of 25 N is applied on the block B, the force of friction between A and B is

A block of mass 0.1 kg is held against a wall by applying a horizontal force of 5 N on the block. If the coefficient of friction between the block and the wall is 0.5, the magnitude of the frictional force acting on the block is

A cart of mass M has a block of mass m attached to it as shown in the figure. The coefficient of friction between the block and the cart is . The minimum acceleration of the cart so that the block m does not fall is

A boy of mass 40 kg is hanging from the horizontal branch of a tree. The tension in his arms is the least, when the angle between the arms is