Question

Select the correct answer. Which two factors does the power of a machine depend on? A. work and distance B. force and distance C. work and time D. time and distance

Answer 1

Hello!

The answer is: C. work and time

Why?

We need to remember the mechanical power formula. This formula states that power is the amount of work applied during a determined time interval.

Mechanical power is equal to the division of Work by the time while that work is applied.

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

For example, if we want to calculate the power in Watt, the formula will be :

$Power=\frac{Joule}{Second} =Watt$

We have another unit of measurement such as Horsepower (Hp)

$Hp=\frac{Lbf.ft}{min}$

Have a nice day!