Answers

2014-09-16T21:08:15+08:00
PE = mgh                            g = 9.8 m/s^2
1870 J = m (9.8)(2.2 m)                                             
m = 86.7
kg                                        


PE = mgh
PE = (86.7kg)(9.8)(923 m)  
PE = 784236.2 J = 7.8x10^5 J  





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