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ss7ja [257]
2 years ago
13

How much power is needed to lift a 20-kg object to a height of 4.0 m in 2.5 seconds?

Physics
1 answer:
4vir4ik [10]2 years ago
5 0

Answer:

313.92w

Explanation:

Formula for power:

P=W/∆t = Fv

Givens:

m=20kg

∆y=4.0m

∆t=2.5s

a=9.81m/s²

In order to find power, we first need to solve for work.

W=Fd (force*displacement), f=mg

W=mg∆y

W=(20kg)(9.81m/s²)(4.0m)

W=784.8J

P=W/∆t

P=784.8J/2.5s

P=313.92 watts

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The thermal energy that is generated due to friction is 344J.

<h3>What is the thermal energy?</h3>

Now we know that the total mechanical energy in the system is constant. The loss in energy is given by the loss in energy.

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Learn more about thermal energy due to friction:brainly.com/question/7207509

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Answer:

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Explanation:

thats my answer

5 0
3 years ago
Read 2 more answers
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