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Q.

A stone is thrown from point O on ground with velocity v→=5i^+10j^ m/s, where x is horizontal and y is vertical. Its angular velocity about O when the stone is at maximum height of its trajectory is

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a

12rad/s

b

12rad/s

c

1rad/s

d

2rad/s

answer is A.

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Detailed Solution

ω=5sin⁡θr; tan⁡θ=h(R/2)=uy2/2guxuy/g=1 So, ω=5252=12rad/s
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