Class IX

A force acting on a body of mass 7 kg produces an acceleration of 10 ms⁻². The acceleration that the same force will produce in a body of mass 9 kg will be
  1. 5 ms⁻²
  2. 6 ms⁻²
  3. 6.7 ms⁻²
  4. 7.7 ms⁻²
The quantity of motion a body possesses due to its mass and velocity is called
  1. Force
  2. Inertia
  3. Momentum
  4. Acceleration
The resultant of all the forces acting on a body is called
  1. Net force
  2. Net friction
  3. Net velocity
  4. Net momentum
The body jumps out of a moving van. There is a danger for him to fall
  1. Away from the van
  2. Towards the moving van
  3. In the direction of motion
  4. Opposite to the direction of motion
The shape and size of a body on which action takes place can also be changed due to
  1. Force
  2. Weight
  3. Velocity
  4. Momentum
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