Class IV

Which of the following is not a source of energy?
  1. Coal
  2. Stone
  3. Petrol
  4. Wood
A body can not start moving or stop moving without
  1. Force
  2. Gravity
  3. Pressure
  4. Temperature
Which of the following device do not require electric current for working?
  1. Funnel
  2. Fan
  3. CD player
  4. Television
A vehicle stops on applying breaks because
  1. Breaks increase the mass
  2. Breaks increase the acceleration
  3. Breaks apply a force in same direction
  4. Breaks apply a force in opposite direction
Ability to do work is called
  1. Power
  2. Force
  3. Energy
  4. Motion
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