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CBSE Class 9 Answered

Answer 57
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Asked by md775016 | 25 Feb, 2018, 06:59: PM
answered-by-expert Expert Answer
Formula to be used :- v2 = u2+2gh, where u is intial velocity that is zero, g is acceleration due to gravity and h is height in metre
 
v = square root of(2gh) = square root of(2×9.8×5) = √98 m/s
Kinetic energy = (1/2)mv2 = 0.5×0.2×98 = 9.8 J
Answered by Thiyagarajan K | 26 Feb, 2018, 12:13: PM
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