EWT | Academic Question

Questions
Question (1)
QN0035127

According to work-energy theorem, the work done by the net force on a particle is equal to the change in its

 

  • (A)

    kinetic energy

  • (B)

    linear momentum

  • (C)

    potential energy

  • (D)

    angular momentum

Correct Answer: A
Explanation:

Work done by the net force = change in kinetic energy of the particle.

This is according to work energy theorem.

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Question (2)
QN0035128

A body starts from rest and acquires a velocity  in time . The work done on the body in time  will be proportional to

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: D
Explanation:

Work done on the body is gain in the kinetic energy. Acceleration of the body is .

Velocity acquired in time  is

K.E. acquired . That is work done

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