A ball is projected horizontally from top of a cliff. The time to hit ground depends on MCQ with Answer and Explanation

A ball is projected horizontally from top of a cliff. The time to hit ground depends on
A. Both velocity and height
B. Mass of ball
C. Height of cliff and g
D. Horizontal velocity
Answer: Option C
Solution (By JKSSB Mock Tests)
Vertical motion is independent of horizontal. t = √(2h/g). Mass doesn't affect. Horizontal velocity affects range, not time of fall. Projectile motion independence of perpendicular components.

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Question #1
The gravitational constant G has dimensions
A. [ML²T⁻²]
B. [M⁻¹L³T⁻²]
C. [M⁻²L³T⁻²]
D. [M⁻¹L³T⁻¹]

Correct Answer: Option B


Explanation:
F = G m1 m2 / r² => G = F r² / (m1 m2) => [MLT⁻²][L²]/[M²] = [M⁻¹L³T⁻²].

This question belongs to: Science Physics
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The product of force and displacement in the direction of force is
A. Momentum
B. Work
C. Power
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Correct Answer: Option B


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Which principle explains the working of hydraulic brakes?
A. Pascal
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C. Newton
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Correct Answer: Option A


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This question belongs to: Science Physics