Question

Which is the best description of power? A. the amount of kinetic energy lost during motion
B. a measure of how fast an object can travel
C. the amount of energy transfer during motion
D. a measure of how fast a machine performs work​

Answer 1

Answer:

D. a measure of how fast a machine performs work​

Explanation:

Power can be defined as the energy required to do work per unit time.

Mathematically, it is given by the formula;

$Power = \frac {Energy}{time}$

Hence, the best description of power is that, it is a measure of how fast a machine performs work.

This can be calculated by using the mathematical expression below;

$Power = \frac {Work done}{Time}$

But we know that, $Workdone = force * distance$