Question

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

Answer 1

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`