A projectile is launched from the g...
Question

# A projectile is launched from the ground level with a speed u at an angle ( theta ) with the horizo What is its average velocity between the two instants that it crosses half the maximum heigh(A) ( u sin theta )(B) ( u cos theta )(C) ( u tan theta )( (mathrm{D}) mathrm{u} )

JEE/Engineering Exams
Physics
Solution
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(u_{x} = ucos theta, uy = usin theta) (avg velocity=displacement/time)
displament is anly in ( x ) diresfion. aug velocity ( =frac{(u cos theta) t}{t}=u cos theta )
Ophion ( (B) )