13. A set of pulleys lifts an 800 N crate 4 meters in 7 seconds. What power was used?
2 answers:
Answer:
457.14 Watt
Explanation:
The information we have is:
Force:
Distance:
Time:
the formula for the power is:
where is work, and
si time.
Also, the formula for work is:
Where is the force, and
is the distance.
Substituting the formula for work into the formula for power:
substituting all the values to find the power:
the power that was used is 457.14 Watt
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