Motion In A Plane Ques 27
27. The velocity of a projectile at the initial point $A$ is $(2 \hat{i}+3 \hat{j}) m / s$. It’s velocity (in $m / s$ ) at point B is
[2013]
(a) $-2 \hat{i}+3 \hat{j}$
(b) $2 \hat{i}-3 \hat{j}$
(c) $2 \hat{i}+3 \hat{j}$
(d) $-2 \hat{i}-3 \hat{j}$
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Answer:
Correct Answer: 27.(b)
Solution:
- (b) At point B the direction of velocity component of the projectile along $y$-component reverses, while the $x$-component remains unchanged.
Hence, $ \vec{V} _B=2 \hat{i}-3 \hat{j}$
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