A) \[\sqrt{gr}\]
B) \[\sqrt{2gr}\]
C) \[\sqrt{3gr}\]
D) \[\sqrt{5gr}\]
Correct Answer: A
Solution :
Since, \[{{v}^{2}}={{u}^{2}}-2gh\] \[\therefore \] \[{{v}^{2}}=5gr-2g(r)\] \[\Rightarrow \] \[{{v}^{2}}=3gr\] \[\Rightarrow \] \[v=\sqrt{3gr}\]You need to login to perform this action.
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