Question

The speed of a projectile at maximum height is half of initial speed . The angle of projection is
(1) 60
(2) 15
(3) 30
(4) 45

Answer 1

Answer:

At maximum height = Speed is ucos@

Vertical component is zero

according to question

ucos@= 1/2*u

cos@ = 1/2

@ = 60 Degree

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