Question

The path followed by a body projected along y-axis is given as by √ x – x2/ 2 , if g = 10 m/s2
, then the initial velocity of projectile will be – (x and y are in m)

Answer 1

Comparing y=3–√x−12x2
with y=tanθx−12gu2cos2θx2
tanθ=3–√=>θ=60∘
and 12=12gu2cos2θ
=>u2cos2θ=g
u2cos260=10
u2.14=10
u2=40
u=2√10