Same chapter3 marksDifficulty: Medium
A body is thrown vertically upwards with a speed of 30 m s−1. Find the maximum height it reaches and the time it takes to return. Take g = 10 m s−2.
Kinematics
3 marksDifficulty: Medium
For a projectile launched at speed u, at what angle is the horizontal range greatest, and what is that range?
Original Khojo Papers practice question — not from a past board paper.
Answer
The range is greatest at 45°, and its value is u2/g.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The range is u2 sin 2θ / g, which is largest when sin 2θ = 1, that is when 2θ = 90°.
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