Question

A projectile is thrown with initial velocity u₀ and angle 30° with the horizontal. If it remains in the air for 1s, what was its initial velocity?

Moderate

Solution

Time of flight, $T = \frac{2 u sinθ}{g}$
Given, $u = u_{0}, T = 1 s, θ = 30 °, g = 9.8 {ms}^{- 2}$
$u_{0} = g = 9.8 {ms}^{- 1}$

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