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nika2105 [10]
3 years ago
6

A foot player runs 1.6m/s and has a KE of 790 J. What is his mass?

Physics
1 answer:
Mariana [72]3 years ago
3 0
The equation for kinetic energy is,

Ke = (1/2)mv^2.

You're given a kinetic energy of 790 joules, and a speed of 1.6 m/s. Plugging these values into the equation, we get,

790 = (1/2)(1.6)^2(m).

Solving for m, we get,

m = (790)/(0.5(1.6)^2).

I'll let you crunch out those numbers for yourself :D

If you have any questions, feel free to ask. Hope this helps!
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Answer:

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5 0
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Soloha48 [4]

Answer:

The length of her shadow is changing at the rate  -2 m/s

Explanation:

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taking the derivative with respect to t of both sides

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dx/dt = 1/3 * (-6)

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a. 1st law

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