Class IX

The gravitational potential energy of an object is due to
  1. its mass
  2. its acceleration due to gravity
  3. its height above the earth’s surface
  4. all of above
. The spring will have maximum potential energy when
  1. it is pulled out
  2. it is compressed
  3. both (a) and (b)
  4. neither (a) nor (b)
If the velocity of a body is doubled its kinetic energy
  1. gets doubled
  2. becomes half
  3. does not change
  4. becomes 4 times
the velocity of a body is doubled its kinetic energy
  1. gets doubled
  2. becomes half
  3. does not change
  4. becomes 4 times
. The energy possessed by an oscillating pendulum of a clock is
  1. kinetic energy
  2. potential energy
  3. restoring energy.
  4. mechanical energy
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