A particle is projected with initial speed u and at an angle 
with horizontal. What is the radius of curvature of the parabola traced out by the projectile at a point where the particle velocity makes an angle 
/2 with the horizontal?
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Sol. 
u cos θ = v cos θ /2
⇒ v = 
a ⊥ = g cos θ /2 ⇒ R = 
= 
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