Question Paper
Class / Subject: Class 9 (CBSE) · Science
Chapter: Chapter 8 — Chapter 8: Force and Laws of Motion
Time Allowed: 15 minutes
Max Marks: 6
1. Newton's second law is expressed as: [1]
(A) F=ma
(B) F=ma²
(C) F=m/a
(D) F=a/m
2. Inertia is directly related to an object's: [1]
(A) mass
(B) colour
(C) temperature
(D) shape only
3. Calculate the force needed to accelerate a 5kg object at 2 m/s²: [1]
(A) 10N
(B) 5N
(C) 2N
(D) 7N
4. Momentum is calculated as: [1]
(A) mass × velocity
(B) mass × acceleration
(C) force × time
(D) mass ÷ velocity
5. Newton's Third Law states that every action has: [1]
(A) an equal and opposite reaction
(B) a smaller reaction
(C) no reaction
(D) a delayed reaction
6. Calculate the momentum of a 2kg object moving at 3 m/s: [1]
(A) 6 kg m/s
(B) 5 kg m/s
(C) 1.5 kg m/s
(D) 9 kg m/s