Question

What is the kinetic energy of a 9 kg skateboard that is traveling at a speed of 5 m/s?

Answer 1

`112.5J`

Explanation:

Kinetic energy is expressed in the formula of

`KE=1/2mv^2`

`m` is the mass of the object in kilograms

`v` is the speed of the object in `m"/"s^2`

`KE=1/2*9*5^2J`

`KE=4.5*25J`

`KE=112.5J`

So, the skateboard has an energy of `112.5` joules.