JEE Class main Answered
Sir plz solve it and help me the way u r getting the angle of initial velocity with ground level,I mean the full calculation plzzz
Asked by vishakhachandan026 | 23 May, 2019, 01:12: PM
Expert Answer
Horizontal Range R for projectile motion is given by,
where u is projection speed, α is projection angle and g is acceleration due to gravity.
Here bird is at a distance 100 m, hence range R = 100 m and bullet speed u = 500 m/s
hence from eqn.(1), we get sin(2α) = 100×2×10/(500×500) = 0.008 .............(2)
hence α = (1/2)sin-1(0.008) = 0.23°
If aiming height is h, then h = 100×tanα = 100×tan(0.23°) ≈ 40 cm
Answered by Thiyagarajan K | 23 May, 2019, 03:10: PM
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