1 Answer

HartleySan · Answer 1 · 2022-01-25T22:06:33+0000

Answer:

The mass of the dog is 15 kg

Step-by-step explanation:

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

$KE=(1)/(2) m\,v^2$

Then, in our case:

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

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