JEE PHYSICS UNIT 3: LAWS OF MOTION
QUIZ NO 4
TOTAL QUESTIONS = 20


1. A block is placed on an inclined plane of angle 45°. The coefficient of friction between the block and the plane is 0.3. What is the net force acting on the block if its weight is 200 N?


2. A block of mass 2 kg is sliding on a rough surface with a velocity of 4 m/s. The coefficient of kinetic friction is 0.2. How far will the block slide before coming to rest? (g = 10 m/s²)


3. A bullet of mass 0.02 kg is fired with a velocity of 100 m/s into a wooden block of mass 0.98 kg at rest. What is the final velocity of the system after the collision?


4. A force of 10 N is applied on a block of mass 5 kg. What is the acceleration produced in the block?


5. A force of 100 N acts on a block of mass 50 kg placed on a smooth horizontal surface. What is the velocity of the block after 5 seconds?


6. A car of mass 1200 kg is moving with a speed of 30 m/s. What is the required force to bring it to rest in 10 seconds?


7. Two blocks of masses 3 kg and 6 kg are placed in contact on a smooth horizontal surface. A force of 18 N is applied to the 6 kg block. What is the acceleration of the system?


8. A body of mass 2 kg is dropped from a height of 10 m. What is its momentum just before hitting the ground? (g = 10 m/s²)


9. Which of the following is a vector quantity?


10. A ball is thrown horizontally with a speed of 20 m/s from the top of a building 25 m high. How far from the base of the building will it strike the ground? (g = 10 m/s²)


11. A ball of mass 0.5 kg is moving with a velocity of 10 m/s. What is its kinetic energy?


12. Two blocks of masses 5 kg and 10 kg are placed one over the other on a smooth horizontal surface. A force of 60 N is applied to the lower block. What is the acceleration of the system?


13. A particle of mass 2 kg is moving with a velocity of 3 m/s. What is the momentum of the particle?


14. A ball of mass 0.5 kg is thrown vertically upward with a speed of 20 m/s. What is the net force acting on the ball at its highest point? (g = 10 m/s²)


15. A 2 kg block is pushed against a wall with a force of 40 N. If the coefficient of friction between the block and the wall is 0.5, what is the frictional force?


16. A block of mass 5 kg is sliding down a smooth inclined plane of angle 30°. What is the acceleration of the block? (g = 10 m/s²)


17. A force of 50 N acts on a body of mass 10 kg. What is the resulting acceleration?


18. A body of mass 5 kg is dropped from a height of 10 m. What is its velocity just before hitting the ground? (g = 10 m/s²)


19. A particle of mass 1 kg is moving with a velocity of 10 m/s. What is the work required to stop the particle?


20. A car of mass 1500 kg is moving with a speed of 20 m/s. What is the kinetic energy of the car?



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