When a body falls freely under gravity, its MCQ with Answer and Explanation

Question

Share Report Error

When a body falls freely under gravity, its

A. Mechanical energy remains constant

B. Mass increases

C. P.E. increases

D. K.E. decreases

Answer: Option A

Solution (By JKSSB Mock Tests)

Neglecting air resistance, total mechanical energy conserved.

This question belongs to: Science Physics

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1

The electromagnetic waves with highest frequency are

A. Radio waves

B. X-rays

C. Ultraviolet

D. Gamma rays

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
Gamma rays >10¹⁹ Hz, highest.

This question belongs to: Science Physics

Question #2

The phenomenon of persistence of sound due to multiple reflections is called

A. Doppler effect

B. Resonance

C. Reverberation

D. Echo

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option C

Explanation:
Reverberation is prolongation of sound due to reflections blending. Echo is distinct repetition.

This question belongs to: Science Physics

Question #3

A fuse wire should have

A. Low melting point and high resistance

B. High melting point and high resistance

C. High melting point and low resistance

D. Low melting point and low resistance

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
Fuse wire must melt easily (low melting point) to break circuit on overload, and have high resistance to produce sufficient heat (I²R). Materials: tin-lead alloy. Copper not used as fuse.

This question belongs to: Science Physics

Explore All Physics MCQs