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Q.

A body is projected with velocity 24 ms–1 making an angle 30° with the horizontal. The vertical component of its velocity after 2s is (g=10ms–1)

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a

8 ms-1 upward

b

32 ms-1 upward

c

8 ms-1 downward

d

32 ms-1 downward

answer is B.

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Detailed Solution

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Vy=usinθgt=24sin3010×2=-8 m/s
–Ve sign indicates downward motion.

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A body is projected with velocity 24 ms–1 making an angle 30° with the horizontal. The vertical component of its velocity after 2s is (g=10ms–1)