CBSE  /  Class 11  /  Physics  /  Laws of Motion

  • 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

  • the gravitational mass
  • the electromagnetic mass
  • the internal mass
  • 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

  • 1 N
  • 4 N
  • 2 N
  • 8 N

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

  • 4 N
  • 10 N
  • 22 N
  • 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?

  • one
  • four
  • two
  • three

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

  • by Newtons first law
  • by Newtons second law
  • by Newtons third law
  • 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

  • Gravitational force
  • real force
  • fictitious force or pseudo force
  • frictional force

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

  • 10 kg m/s
  • 7 kg m/s
  • 2 .5 kg m/s
  • 3 kg m/s

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

  • gravitational force
  • electrostatic force
  • weak force
  • 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

  • normal to the surface upwards
  • normal to the surface downwards
  • along the direction of the applied force
  • 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

  • 1 N
  • 2 N
  • 3 N
  • 4 N
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