Question

Question 7


Angie is moving a couch with a mass of 48 kg. She moves it in 120 seconds using 240 J of work. What is her power output?
Answer

2 W

2.5 W

5 W

10 W

3 points
Question 8


Sam did 480 J of work when moving a bag with a mass of 38 kg. He did the work in 4 minutes. What was the power output?
Answer

442 W

20 W

120 W

2 W

Answer 1

In this context, power is the rate of doing work.
\[Power (W) = \frac{Work (J)}{time (s)}\]