Which one of the following statements is Wrong? (a) A body can have zero velocity and still be accelerated. (b) A body can have a constant velocity and still have a varying speed. (c) A body can have a constant speed and still have a varying velocity. (d) The direction of the velocity of a body can change when its acceleration is constant.

Answer: (b). (a) True: at the top of a vertical throw v = 0 but a = g. (b) Wrong: constant velocity means constant magnitude and direction, so speed cannot change. (c) True: uniform circular motion has constant speed but changing velocity. (d) True: in projectile motion a = g is constant but the velocity direction changes. So the answer is (b).

Which one of the following statements is Wrong? | MHT CET 2023 (13 May, Shift 1)

Q14MHT CET 2023 · 13 MAY · SHIFT 1Easy

Velocity, Acceleration & Variable Motion

Which one of the following statements is Wrong?

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Answer: (b)

(a) True: at the top of a vertical throw $v = 0$ but $a = g$ .
(b) Wrong: constant velocity means constant magnitude and direction, so speed cannot change.
(c) True: uniform circular motion has constant speed but changing velocity.
(d) True: in projectile motion $a = g$ is constant but the velocity direction changes.
So the answer is (b).

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Velocity, Acceleration & Variable Motion question from MHT CET 2023 (13 May, Shift 1)

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