Answers

2016-03-16T21:14:39+05:30
1300 J I think so
W=mgs 
W=5.2 * 9.8*25
W= 1274 J
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2016-03-16T22:07:59+05:30
As we know that when work done against gravity then we use mgh therefore
work done = 5.2×10×25
= 1300 joule You can use 9.8 also
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