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A particle projected with velocity u at angle `theta` with horizontal at t=0. What is the magnitude of change in the velocity of the particle when it

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A particle projected with velocity u at angle `theta` with horizontal at t=0. What is the magnitude of change in the velocity of the particle when it is at maximum height?
A. `(u cos theta)/2`
B. `u cos theta`
C. `u sin theta`
D. none of these
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Correct Answer - c
`vecu_(i)=u cos theta hati+u sin theta hatj`
`vecu_(f)=u cos theta hati`
`Deltavecu=vecu_(f)-vecu_(i)=-u sin thetahatj`
`|Deltavecu|=u sin theta`
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