A dog running at a speed of 12 m/s has 1,080 J of kinetic energy. What is the mass of the dog

1 answer:

Gnom [1K]3 years ago

5 0

Answer:

The mass of the dog is 15 kg

Explanation:

We use the formula for the kinetic energy of the dog:

$KE=\frac{1}{2} m\,v^2$

Then, in our case:

$KE=\frac{1}{2} m\,v^2\\1080 \,=\,\frac{1}{2} m\,(12)^2\\m = \frac{2*1080}{144} \\m=15 \,\,kg$

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