NUMS Mdcat 2022 | Solved with Explanation | mosaicbro.com

NUMS Mdcat 2022 | Solved with Explanation

3 of 157 questions (Page 23 of 23)

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155 If the speed of a body is doubled, its kinetic energy becomes:
Correct Answer: D
Explanation: KE = ½ mv² → If v doubles, KE becomes 4 times (KE' = ½ m(2v)² = 2mv²).
156 The minimum required velocity to put a satellite into the orbit is called:
Correct Answer: C
Explanation: Critical velocity is the minimum speed needed for a stable orbit.
157 When an object experiences circular motion, the direction of centripetal acceleration is:
Correct Answer: A
Explanation: Centripetal acceleration always points toward the center of the circular path.
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