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3 years ago

13

PLEASE HELPPP!! 40 POINTS! A young man exerted a force of 900 newtons for 10 seconds to push his car. However, he could not get

the car to move. How much work did he do?
9000 Joules

90 Watts

no work is done

90 joules

9000 watts

1 answer:

Dmitrij [34]3 years ago

4 0

No work is done because the object needs to be moved. The formula for work is Work = Force x Distance.

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2 years ago

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Answer:

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Explanation:

Given that,

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Distance of the enemy ship from the mountain $d'=6.10\times10^{2}\ m$

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Angle = 74.9°

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$v_{x}=v\cos\theta$

Put the value into the formula

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$v_{y}=v\sin\theta$

Put the value into the formula

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We need to calculate the time

Using formula of time

$t=\dfrac{d}{v_{x}}$

$t=\dfrac{2.46\times10^{3}}{66.42}$

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$H= v_{y}t-\dfrac{1}{2}gt^2$

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$H=246.19\times37.03-\dfrac{1}{2}\times9.8\times(37.03)^2$

$H=2397.4\ m$

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Using formula of distance

$H'=H-h$

Put the value into the formula

$H'=2397.4-1800$

$H'=597.4\ m$

Hence, The distance close to the peak is 597.4 m.

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2 years ago

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