The maximum height reached by a projectile is 4m

Asked by admin @ 17/08/2021 in Physics viewed by 313 People

The maximum height reached by projectile is 4 m. The horizontal range is 12 m. Velocity of projection in ms raised to -1 is (g is acceleration due to gravity)

( answer should come 5√g/2 )

Answered by admin @ 17/08/2021

H = (R tan Ф ) / 4
4 = (12 tan Ф ) / 4

tan Ф = 4/3 sin 2Ф = 2 tan Ф / (1 + tan² Ф) = 0.96

R = u² sin 2Ф / g

u² = 12 * g / 0.96 = 25 g /2

u = 5 √(g/2)

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