A) \[\frac{{\mathbf{\vec{v}}}}{2}and\frac{v}{2}\]
B) \[0\,and\frac{v}{2}\]
C) 0 and 0
D) \[\frac{{\mathbf{\vec{v}}}}{2}and\,0\]
Correct Answer: B
Solution :
Average velocity\[=0\], because net displacement of the body is zero. Average speed \[=\frac{\text{Total}\,\,\text{distance}\,\,\text{covered}}{\text{Time}\,\,\text{of}\,\,\text{flight}}=\frac{2{{H}_{\max }}}{2u/g}\] \[{{v}_{av}}=\frac{2{{u}^{2}}/2g}{2u/g}\] \[\Rightarrow \] \[{{v}_{av}}=\frac{u}{2}\] Velocity of projection\[=v\] (given) \[\therefore \] \[{{v}_{av}}=\frac{v}{2}\]You need to login to perform this action.
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