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Sergeeva-Olga [200]
3 years ago
12

Work and energy both have the unit?

Physics
1 answer:
sveta [45]3 years ago
6 0
The both have the unit (J) for Jules
 
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How much power is needed to lift the 200-N object to a height of 4 m in 4 s?
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Answer: 2000 watts

Explanation:

Given that,

power = ?

Weight of object = 200-N

height = 4 m

Time = 4 s

Power is the rate of work done per unit time i.e Power is simply obtained by dividing work by time. Its unit is watts.

i.e Power = work / time

(since work = force x distance, and weight is the force acting on the object due to gravity)

Then, Power = (weight x distance) / time

Power = (200N x 4m) / 4s

Power = 8000Nm / 4s

Power = 2000 watts

Thus, 2000 watts of power is needed to lift the object.

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