If the power of an engine is doubled while the time remains constant, the work done:
becomes double
Power is defined as the rate of doing work, so P = W / t, which rearranges to W = P × t.
If the time t is kept constant and the power P is doubled, then the work done becomes W' = (2P) × t = 2 × (P × t) = 2W.
So the new work done is exactly twice the original work done.
Hence, the correct answer is becomes double.
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Important Questions from Work Power and Energy
- The work done by a 10 Newton force acting on a body, which results in the displacement of 2 m in the direction of the force, is __________.
- During energy transformation, the total energy of a system:
- An object of mass 1 kg is moving with a velocity 10 m/s. Find the kinetic energy of the object.
- The efficiency of a machine can never be ______.
- In practice, the work output of a machine is ______ the work input due to the effect of friction.
