A projectile is projected at 30^{circ} from horizontal with initial velocity 40,ms ^{-1} . velocity

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3-2.Motion in Plane

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

A

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

B

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

C

$20\,ms ^{-1}$

D

Zero

(JEE MAIN-2023)

Solution

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

Standard 11

Physics

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