Newton's First Law of Motion is also known as the Law of: MCQ with Answer and Explanation

Newton's First Law of Motion is also known as the Law of:
A. Inertia
B. Action and Reaction
C. Gravitation
D. Momentum
Answer: Option A
Solution (By JKExamLibrary)
Newton's First Law states that a body at rest stays at rest, and a body in motion stays in uniform motion unless acted upon by an external unbalanced force. This inherent property of matter to resist any change in its state of rest or motion is called inertia, hence it is known as the Law of Inertia.

This question belongs to: Science Physics

Discuss this Question (0)

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

Practice More Physics Questions

Question #1 Report Error
The loudness of sound depends on
A. Wavelength
B. Amplitude
C. Frequency
D. Speed

Correct Answer: Option B


Explanation:
Loudness correlates with intensity, which is proportional to square of amplitude. Frequency determines pitch. Larger amplitude → louder sound. Measured in decibels.

This question belongs to: Science Physics
Question #2 Report Error
Atmospheric pressure at sea level is 1.013×10⁵ Pa. Equivalent height of mercury column (density 13600 kg/m³, g=9.8) is
A. 13.6 m
B. 0.76 m
C. 0.76 cm
D. 7.6 m

Correct Answer: Option B


Explanation:
P = ρgh => h = P/(ρg) = 1.013×10⁵/(13600×9.8) ≈ 0.76 m = 76 cm.

This question belongs to: Science Physics
Question #3 Report Error
The wavelength of a wave is the distance between two consecutive
A. Crest and trough
B. Both B and C
C. Troughs
D. Crests

Correct Answer: Option B


Explanation:
Wavelength is distance between successive crests or successive troughs.

This question belongs to: Science Physics