A) 50 m
B) 12.5 m
C) 25 m
D) 10 m
Correct Answer: B
Solution :
Let h is that height at which the kinetic energy of the body becomes half its original value i.e. half of its kinetic energy will convert into potential energy \ mgh = \[\frac{490}{2}\]Þ \[2\times 9.8\times h=\frac{490}{2}\]Þ \[h=12.5m.\]You need to login to perform this action.
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