Answers

2016-07-20T19:55:37+08:00
GPE= mgh

29.4J=1.5kg(9.8m/s2)h
29.4J=(14.7kg•m/s2)h
29.4J÷14.7kg•m/s2=h
2m=h

(J=kg•m2/s2)
0