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Klio2033 [76]
3 years ago
5

A rolling ball has 18 joules of kinetic energy and is rolling 3 m/s find the mass

Mathematics
1 answer:
lisov135 [29]3 years ago
3 0
Hi there. I think that this question is supposed to go in the Physics category but I'll help you.
the equation for kinetic energy is 1/2mv^2.
Plug the given values in.
18=1/2(m)(3)^2
18=1/2m(9)
36=9m
m=4
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we know that

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see the attached figure with letters to better understand the problem

Step 1

<u>Find the measure of the angle x</u>

In the triangle ABC

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<u>the answer Part a)  is</u>

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Step 2

<u>Find the measure of the angle z</u>

we know that

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substitute the value of x

81\°+z=180\°

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<u>the answer Part b)  is</u>

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Step 3

<u>Find the measure of the angle y</u>

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13\°+z\°+y\°=180\°

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13\°+99\°+y\°=180\°

112\°+y\°=180\°

y\°=180\°-112\°

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