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a pulley is used to lift a 2000 N safe over frosty's head. the safe is lifted 6m in 4s by Rudolph. how much power did Rudolph use?
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a pulley is used to lift a 2000 N safe over frosty's head. the safe is lifted 6m in 4s by Rudolph. how much power did Rudolph use?

User BOUKANDOURA Mhamed
by
4.7k points

1 Answer

6 votes

Answer:

3000W

Step-by-step explanation:

Given parameter:

Weight of safe = 2000N

Height of lift = 6m

Time = 4s

Unknown:

Power used by Rudolph = ?

Solution:

Power is the rate at which work is being done. It is expressed as:

Power =
(Work done )/(Time taken)

Work done = Weight x height = 2000 x 6 = 12000J

Power =
(12000)/(4) = 3000W

User Ruediger Keller
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5.4k points
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