A projectile is projected at from the horizontal with initial velocity . The velocity of the projectile at from the start will be (Given ) [2023]

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Solution

Q.
A projectile is projected at $30 °$ from the horizontal with initial velocity $40 {m s}^{- 1}$ . The velocity of the projectile at $t = 2 s$ from the start will be (Given $g = 10 {m/s}^{2}$ ) [2023]

1 $20 \sqrt{3}$ ${ms}^{- 1}$

2 $40 \sqrt{3}$ ${ms}^{- 1}$

3 $20$ ${ms}^{- 1}$

4 zero

Ans.
(1)

At $t = 2$ particle is at maximum height moving with velocity $v = 40 \cos 30 ° = 20 \sqrt{3}$ ${ms}^{- 1}$

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