CBSE Class 11 Physics Laws of Motion Quiz 1

1. The mass of a body which is equal to the ratio of the force acting on a body to the acceleration produced in the body is

A the gravitational mass B the electromagnetic mass C the internal mass D the inertial mass

2. A spherical ball of mass 10-6 kg hits a wall 1000 times per second normally with a velocity of 1000 m/s and rebounds with same velocity along the initial direction. The force experienced by the wall is

A 1 N B 4 N C 2 N D 8 N

3. The force required to produce an acceleration of 2 m/s² on a mass of 2 kg is

A 4 N B 10 N C 22 N D 18 N

4. A machine gun fires a bullet of mass 40 g with a velocity of 1200 ms^-1. The man holding it can exert a maximum force on 144 N on the gum. How many bullets can he fire per second at the most?

A one B four C two D three

5. A passenger in a moving bus is thrown forward when the bus is suddenly stopped. This is explained

A by Newtons first law B by Newtons second law C by Newtons third law D by the principle of conservation of momentum

6. A passenger sitting in a bus moving at uniform speed, feels pushed backward whenever the bus is accelerated forward. This type of force is called

A Gravitational force B real force C fictitious force or pseudo force D frictional force

7. A body of mass 5 kg is travelling with a uniform velocity of 2 m/s. Its momentum is

A 10 kg m/s B 7 kg m/s C 2 .5 kg m/s D 3 kg m/s

8. Inside the nucleus, two protons are held together by a force which overcomes the repulsion. This force is called

A gravitational force B electrostatic force C weak force D strong force

9. A block of wood is placed on a surface. A force is applied parallel to the surface to move the body. The frictional force developed acts

A normal to the surface upwards B normal to the surface downwards C along the direction of the applied force D opposite to the direction of the applied force

10. A bullet of mass 25 g moving with a velocity of 200 cm/s is stopped within 5 cm of the target. The average resistance offered by the target is

A 1 N B 2 N C 3 N D 4 N