4. A cinder block is sitting on a platform 20 m high. It has a mass of 4 kg. The block has energy. Calculate it.

1 answer:

4 0

Answer:

Explanation:

Since the block is at rest in an elevated position, we can assume that it only has potential energy.

U=mgh is the formula for potential energy where U=potential energy, m= mass, g=acceleration due to gravity, and h=height.

Plug in known variables....

U=4kg*9.8m/s^2*20m

U=784 joules of potential energy or letter A.

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Vladimir79 [104]

It means, <span>Acceleration increases as mass decreases.

So, option C is your answer.

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3 0

2 years ago

LekaFEV [45]

Answer and Explanation:

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2 years ago

Nitella [24]

Answer:

20%

Explanation:

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=(7÷35)×100

=(0.2)×100

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