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Tanzania [10]
3 years ago
8

2. Calculate the kinetic energy of a dodgeball that has a mass of 2 kg and velocity of 4 m/s after being thrown.

Biology
1 answer:
gizmo_the_mogwai [7]3 years ago
3 0

Answer:

c.16J

Explanation:

because kinetic energy =1/2mv²

1/2 ×2×4²=16J

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Let's let A represent the measurement of one of the those angles in our pentagon.

The sum of our angles in our pentagon would then be A+A+A+A+A or 5A.

But we are also given that this equals 40x^2-65x+50.

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If we divide both sides by 5 we can find what one of our angles is in terms of x.  So let's do that A=8x^2-13x+10.

So we want to know the sum of two our angles, we want to know what is A+A or 2A.  2A=2(8x^2-13x+10).  To obtain that I just multiplied both sides of A=8x^2-13x+10 by 2.

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