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Rus_ich [418]
3 years ago
15

You have been asked to make a roller coaster more exciting. The owners want the speed at the bottom of the first hill doubled. H

ow much higher must the first hill be built?
Physics
1 answer:
qaws [65]3 years ago
4 0

Answer:

The height will be 4 times.

Explanation:

Given that,

The speed at the bottom of the hill doubled.

We need to calculate the height

Using conservation of energy

K.E_{t}+P.E_{t}=K.E_{b}+P.E_{b}

K.E_{b}=P.E_{t}

\dfrac{1}{2}mv^2=mgh

\dfrac{1}{2}m(4v^2)=mgh

Therefore,

P.E = mg(4h)

Here, m and g are constant

Hence, The height will be 4 times.

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What is one watt ? Write the relation of watt with kilowatt , megawatt , and horsepower .​
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See the explanation below

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3 years ago
What's the value of 1,152 Btu in joules? A. 1,964,445 J B. 2,485,664 J C. 987,875 J D. 1,215,360 J
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Answer: Option (d) is correct.

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