Power is the rate of doing:
ATime
BWork
CHeat
DMass
Answer & Solution
Correct answer: B. Work
1. Two machines may do the same work in different times.
2. Power compares work against the time taken.
3. Power is defined as the rate at which work is done.
4. So the answer is work.
_Source: NCERT Class 9 Science, Ch 7 'Work, Energy, and Simple Machines'_
Related questions
In an elastic collision of two bodies, what is conserved?Work and energy are measured in the same:The dimensions of power are:Which theorem links the work done with the change in kinetic energy?The scalar product of two vectors gives a:In an inelastic collision, the final kinetic energy is:The unit of potential energy is the same as that of:A force from which a potential energy can be derived is called: