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Paul lifts a sack weighing 245 newtons vertically from the ground and places it on a platform at a height of 0.7 meters. if he takes 10 seconds to do this task, what power has he expended during this time?
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Paul lifts a sack weighing 245 newtons vertically from the ground and places it on a platform at a height of 0.7 meters. if he takes 10 seconds to do this task, what power has he expended during this time?

User MonkeyMonkey
by
8.8k points

2 Answers

7 votes

Answer:

B. 17.15 watts

Step-by-step explanation:

User Stephanea
by
9.3k points
7 votes
Work done= 245 x 0.7 = 171.5 J
power = work done/time

=> power = 171.5/ 10 = 17.15 W

In short, your answer is 17.15 W (watt)

hope that helps :) good luck
User Darkbound
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7.7k points
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