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PHYSICS [1 Mark Question Answer]

Laws of Motion · ICSE STD 9 (ICSE - English Medium). 3 questions.

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[1 Mark Question Answer]

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3 questions · timed · auto-graded

Question 11 Mark
Does a body weigh same at all places of the Earth? Give a reason for your answer.
Answer
No, A body does not weigh same at all places of the earth because value of acceleration due to gravity (g) is different at different places on the surface of earth.
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Question 21 Mark
Define Newton's second law of motion.
Answer
Newton's second law of motion states that rate of change of momentum is directly proportional to force applied and takes place in the direction of force.
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Question 31 Mark
State units of momentum in
(1) CGS system
(2) Sl system.
Answer
1. In CGS system, unit of momentum is $g cms ^{-1}$.
2. In SI system, unit of momentum is $kgms ^{-1}$.
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[1 Mark Question Answer] - PHYSICS STD 9 Questions - Vidyadip