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Class 9 Science — Chapter 8: Force and Laws of Motion
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 9 Science, Chapter 8 (Force and Laws of Motion). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Q1Easy
Newton's first law of motion is also called the law of:
A.Acceleration
B.Inertia✓ correct
C.Action-reaction
D.Conservation
Why
Objects resist changes in motion — law of inertia.
Q2Medium
F = ma is the mathematical form of:
A.First law
B.Second law✓ correct
C.Third law
D.Law of gravitation
Why
Newton's 2nd law: F = rate of change of momentum = ma.
Q3Hard
A 2 kg ball accelerates from 0 to 10 m/s in 5 s. Force applied =
A.4 N✓ correct
B.5 N
C.10 N
D.20 N
Why
a = 10/5 = 2 m/s². F = ma = 2 × 2 = 4 N.
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