Body moving with constant velocity has: MCQ with Answer and Explanation

Body moving with constant velocity has:
A. Constant acceleration
B. Increasing acceleration
C. Zero acceleration
D. Variable acceleration
Answer: Option C
Solution (By JKSSB Mock Tests)
Constant velocity ⇒ no change in speed or direction ⇒ acceleration = dv/dt = 0. Newton's first law: zero net force for constant velocity. Memory tip: 'Constant v ⇒ a = 0; changing v ⇒ a ≠ 0'. Basic kinematics concept frequently tested to verify acceleration-velocity relationship understanding.

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Question #1
A body of volume 100 cm³ and density 0.8 g/cm³ floats in water. Volume submerged is
A. 100 cm³
B. 50 cm³
C. 20 cm³
D. 80 cm³

Correct Answer: Option D


Explanation:
Weight = buoyancy => ρ_obj V_total g = ρ_water V_sub g => 0.8×100 = 1×V_sub => V_sub = 80 cm³.

This question belongs to: Science Physics
Question #2
The time period of a simple pendulum is 2 s at a place where g=9.8 m/s². Its length is about
A. 0.5 m
B. 1 m
C. 0.25 m
D. 2 m

Correct Answer: Option B


Explanation:
T=2π√(L/g) => L = gT²/(4π²) ≈ (9.8×4)/(4×9.87) ≈ 1 m.

This question belongs to: Science Physics
Question #3
The unit of mutual inductance is
A. Tesla
B. Weber
C. Farad
D. Henry

Correct Answer: Option D


Explanation:
Mutual inductance M = emf/(di/dt), unit Henry.

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