A body is projected at an angle 8 with the horizontal. Derive an expression for its trajectory. (ii) In Tokyo Olympic, Neeraj Chopra wins gold medal in javelin, first athletics gold for India in Olympics history. He thrown javelin 87.03 m to Win Gold medal. Find the initial speed and initial angle w.r.t horizontal at the time of projection to get this maximum range.
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initial speed = root 87.58m ×10 m/ s²
=root 875.6 m²/s²
=30m/s
there fore neeraj chopra throwed javelin in 45⁰ with 30 m/s initial speed
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