Answers

2015-08-04T18:26:03+08:00
THE FORMULA OF GETTING THE POTENTIAL ENRGY IS mgh.
So you will multiply  3kg(mass),9.8 m\s(gravity) and 0.45m(height) so that we get a total of 13.23 joules.

0
2015-08-06T18:32:28+08:00
How about ask the calculator 
0