A quarter horse power motor runs at a speed of 600 𝑟. 𝑝. 𝑚. Assuming 40% efficiency the work done by the motor in one rotation will be

Question: A quarter horse power motor runs at a speed of 600 𝑟. 𝑝. 𝑚. Assuming 40% efficiency the work done by the
motor in one rotation will be

(A) 7.46 𝐽

(B) 7400 𝐽

(C) 7.46 𝑒𝑟𝑔𝑠

(D) 74.6 𝐽

Answer: Option (A)

Solution:

A quarter horse power motor runs at a speed of 600 𝑟. 𝑝. 𝑚. Assuming 40% efficiency the work done by the
motor in one rotation will be
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