Question

A 12 kg object has 500 j of kinetic energy. What is it's speed?

Answer 1

Answer: 9.13 m/s

Step-by-step explanation:

Hi there,

The equation for kinetic energy is

`KE=(1)/(2) mv^2`

With m representing mass and v representing velocity. Before you start a problem, it is very important to check what units you are working with. Mass should always be in kg and velocity in m/s, so it looks like you are all set.

Start by plugging in the given numbers to their respective spots:

`500.0=(1)/(2) (12.0)v^2`

From there, you can just solve for velocity. It should be 9.13 m/s. Remember to round to your significant figures and keep units consistent.

Hope this helps!