A body is thrown vertically upwards. At the highest point of its trajectory: MCQ with Answer and Explanation

A body is thrown vertically upwards. At the highest point of its trajectory:
A. Velocity is zero but acceleration is g downward
B. Velocity and acceleration are zero
C. Velocity is maximum and acceleration is zero
D. Both velocity and acceleration are maximum
Answer: Option A
Solution (By JKExamLibrary)
At maximum height, vertical velocity becomes zero momentarily. However, acceleration due to gravity (g) acts downward throughout the motion, including at the peak. Thus acceleration is g ≈ 9.8 m/s² downward, not zero. Memory tip: 'Peak of projectile: v=0, a=g downward'. This conceptual question tests understanding of motion under gravity, frequently appearing in competitive exams. Always distinguish velocity (which changes) from acceleration (constant in free fall near Earth). Misconception that acceleration is zero at peak is a common trap.

This question belongs to: Science Physics

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Myopia (nearsightedness) is corrected by using
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Correct Answer: Option A


Explanation:
Myopic eye focuses image in front of retina. A diverging (concave) lens spreads light so image falls on retina. Hypermetropia (farsightedness) corrected by convex lens. Bifocals for presbyopia. Cylindrical for astigmatism.

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Correct Answer: Option A


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This question belongs to: Science Physics