Class IX

In dryer, the water is pushed out of wet clothes due to
  1. Friction
  2. Retarding force
  3. Lack of centripetal force
  4. Abundance of centripetal force
When a force acts on a body, it produces an acceleration in the body and will be equal to the rate of change of
  1. Inertia of the body
  2. Velocity of the body
  3. Momentum of the body
  4. Displacement of the body
If we make the sliding surfaces smooth by lubricating etc. the friction can be
  1. Reduce
  2. Increase
  3. Dangerous
  4. None of above
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 force with which the earth attracts the bodies towards its center is called
  1. Mass
  2. Inertia
  3. Weight
  4. Gravitational force
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