A) \[11\text{ }m{{s}^{-1}}\]
B) \[~10\text{ }m{{s}^{-1}}\]
C) \[~8\text{ }m{{s}^{-1}}\]
D) \[~3\text{ }m{{s}^{-1}}\]
Correct Answer: C
Solution :
Velocity of the ball after time t \[=\sqrt{v_{x}^{2}+v_{y}^{2}}=\sqrt{{{(4)}^{2}}+{{(gt)}^{2}}}\] \[=\sqrt{16+{{(10\times 0.7)}^{2}}}=8m{{s}^{-1}}\] Hence, the correction option is [c].
You need to login to perform this action.
You will be redirected in
3 sec
