For a body projected at an angle with the horizontal from the ground, choose the correct statement. (a) Gravitational potential energy is maximum at the highest point. (b) The vertical component of momentum is maximum at the highest point. (c) The horizontal component of velocity is zero at the highest point. (d) The Kinetic Energy (K.E.) is zero at the highest point of projectile motion.

Answer: (a). (a) Height is greatest at the top, so gravitational PE is maximum there: true. (b) Vertical velocity and momentum are zero at the top: false. (c) Horizontal velocity stays ucos θ ≠ 0: false. (d) KE = 12m u²cos ²θ ≠ 0 at the top: false. So the answer is (a).

For a body projected at an angle with the horizontal from the ground… | JEE Main 2023 (1 Feb, Shift 2)

Q8JEE Main 2023 · 1 FEB · SHIFT 2Easy

Velocity, Momentum & Energy in Flight

For a body projected at an angle with the horizontal from the ground, choose the correct statement.

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Answer: (a)

(a) Height is greatest at the top, so gravitational PE is maximum there: true.
(b) Vertical velocity and momentum are zero at the top: false.
(c) Horizontal velocity stays $u\cos\theta \ne 0$ : false. (d) KE $= \frac12m u^2\cos^2\theta \ne 0$ at the top: false.
So the answer is (a).

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Velocity, Momentum & Energy in Flight question from JEE Main 2023 (1 Feb, Shift 2)

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