Solving problems using Newton's Laws of Motion

A body of mass 3 kg is acted on by a force which varies as shown in figure below. The momentum acquired is given by

A block of mass M is pulled along a horizontal frictionless surface by a rope mass m. If a force F is applied at the end of the rope, the net force exerted on the block will be

A) 

B)   

C)   

D)   

A trolley of mass 6 kg strikes a wall with a wall of 3 m/sec and rebounds with a speed of 2 m/sec. What is the change in the momentum of the trolley as a result of collision?

A boy of mass m=3.513 kg is moving along the x-axis with a speed of 5.00 m/sec. What is the magnitude of the momentum?

A rocket works on the principle of conservation of:

A) Mass

B) Energy

C) Momentum

D) Velocity

Name the physical quantities which corresponds to the rate of change of momentum?

Two rubber balls A and B having masses 200 gm and 400 gm respectively are moving in opposite directions with velocity of A equal to 0.3 m/sec. After collision the two balls come to rest, then the velocity of B is

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 stationery on the ground are respectively

Two trains A and B are running in the same direction on parallel tracks such that A is faster than B. If packets of equal weight are exchanged between the two, then

A toy consists of three same compartment  A, B and C. It is being pulled by a constant force F along C. The ratio of tensions in the string connecting AB and BC is

A bullet is fired from a gun. The force on the bullet is given by F= (600-2×10⁵ t), where F is in Newton and t is in second. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bullet?

A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments is

A) is zero

B) depends on the total mass of all the fragments

C) depends on the total speeds of various fragments

D) is infinity

A cricket ball of mass 0.5 kg strikes a bat normally with a velocity of 20 m/sec and rebounds with a velocity of 10 m/sec in the opposite direction. What is the impulse of the force exerted by the ball on the bat.

What force, in Newton, your muscles need to hold a mass of 5 kg in your hand?

A body of mass 2 kg is acted upon by two perpendicular forces 4N along the x-axis and 3N along the y axis. What is the magnitude of acceleration of the body?