Force and laws of motion

Force and laws of motion Worksheet-4

21. The car A of mass 1500 kg, traveling at 25 m/s collides with another car B of mass 1000 kg traveling at 15 m/s in the same direction. After collision the velocity of car A becomes 20 m/s Calculate the velocity of car B after the collision.

A. 22.5 m/s                                    B. 225 m/s

C. 82.5 m/s                                    D. None of these

22. A bullet of mass 10 moving with a velocity of 400 m/s gets embedded in a freely suspended wooden block of mass 900 m/s. what is the velocity acquired by the block ?

Force and laws of motion Worksheet-5

1. What name is given to the product of mass and velocity of a body?

2. Name the physical quantity which is considered to be a measure of the quantity of motion of a body.

3. What is the SI unit of momentum?

4. State whether momentum is scalar or vector.

5. What is the total momentum of the bullet and the gun before firing?

6. Name the physical quantity whose unit is kg.m/s.

Force and laws of motion Worksheet-6

21. Calculate the momentum of a toy car of mass 200 g moving with a speed of 5 m/s.

22. What is the change in momentum of a car weighing 1500 kg when its speed increases from 36 km/h to 72 km/h uniformly?

23. A body of mass 25 kg has a momentum of 125 kg.m/s. Calculate the velocity of the body.

24. Calculate the momentum of the following :

1. an elephant of mass 2000 kg moving at 5 m/s

2. a bullet of mass  200 g moving at 400 m/s