Question

What is the mass of a ball rolling at 5.00m/s if it has 3.00J of kinetic energy?

Answer 1

Step-by-step explanation:

The equation for Kinetic Energy is

`KE=(1)/(2)mv^2` and we know everything but the mass of this ball. Filling in:

`3.00=(1)/(2)m(5.00)^2`. Get everything isolated from the :

`m=(2(3.00))/((5.00)^2)` which tells us that we need 3 significant digits in our answer.

m = .240 kg since mass is always in kg i the velocity is in meters/sec