Question

Power is defined as ___________

(a) product of force and acceleration

(b) ability to do work

(c) rate of doing work

(d) capacity to do work

This question was addressed to me in an interview for internship.

Asked question is from Minimum Power Speed in division Aircraft Force Systems and the Equations of Motion of Aircraft Performance

Answer 1

Correct answer is (c) rate of doing work

For explanation: Power is defined as rate of doing work. In another terms power can be defined as product of force and velocity. The standard S.I. unit of power is Watt. The other units are Watt, Kilowatt, Megawatt, Gigawatt, Horse power. 1 HP= 0.746 KW.