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Work, Energy and Power Test - 25

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Work, Energy and Power Test - 25
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Weekly Quiz Competition
  • Question 1
    4 / -1
    Assertion : Both, a stretched spring and a compressed spring have potential energy.
    Reason : Work is done against the restoring force in each case.
  • Question 2
    4 / -1
    A body falls freely under the action of gravity from a height h above the ground.

  • Question 3
    4 / -1
    A body of mass 1 kg is thrown upwards with a velocity 20 m/s. It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction (g = 10 m / s2)
    Solution

  • Question 4
    4 / -1
    . If the unit of force and length each be increased by four times, then the unit of energy is increased by
    Solution

  • Question 5
    4 / -1
    A man pushes a wall and fails to displace it. He does
  • Question 6
    4 / -1
    Which of the following is a scalar quantity
  • Question 7
    4 / -1
    A force of 5N acts on a 15kg body initially at rest. The work done by the force during the first second of motion of the body is
    Solution

  • Question 8
    4 / -1
    The work done against gravity in taking 10 kg mass at 1m height in 1 sec will b e
    Solution

  • Question 9
    4 / -1
    The slope of the kinetic energy versus position vector gives the rate of change of
  • Question 10
    4 / -1
    A 50kg man with 20kg load on his head climbs up 20 steps of 0.25 m height each. The work done in climbing is
    Solution

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