Lesson 7 – Momentum & Collisions
Stage 2: Board Exam Questions & Answers
Page 4 – Objective Type Questions (MCQs)
This section contains important objective questions frequently asked in Intermediate board examinations. Answers are provided at the end for quick revision.
Q1.
The SI unit of linear momentum is:
A) kg m²/s
B) kg m/s
C) N s²
D) J s
Answer: B) kg m/s
Q2.
If no external force acts on a system, then:
A) Velocity remains constant
B) Momentum remains constant
C) Energy remains constant
D) Acceleration becomes zero
Answer: B) Momentum remains constant
Q3.
In an elastic collision:
A) Only momentum is conserved
B) Only kinetic energy is conserved
C) Both momentum and kinetic energy are conserved
D) Neither is conserved
Answer: C) Both momentum and kinetic energy are conserved
Q4.
The coefficient of restitution for a perfectly inelastic collision is:
A) 1
B) Greater than 1
C) Between 0 and 1
D) 0
Answer: D) 0
Q5.
Which quantity is always conserved in a collision?
A) Kinetic energy
B) Potential energy
C) Linear momentum
D) Mechanical energy
Answer: C) Linear momentum
Q6.
Two bodies stick together after collision. The collision is:
A) Elastic
B) Inelastic
C) Perfectly elastic
D) Perfectly inelastic
Answer: D) Perfectly inelastic
Q7.
Recoil of a gun is due to:
A) Newton’s first law
B) Newton’s second law
C) Conservation of momentum
D) Conservation of energy
Answer: C) Conservation of momentum
Q8.
Relative velocity of A with respect to B is:
A) vA + vB
B) vB − vA
C) vA − vB
D) |vA − vB|
Answer: C) vA − vB
Q9.
Maximum loss of kinetic energy occurs when:
A) e = 1
B) e = 0.5
C) e = 0
D) e > 1
Answer: C) e = 0
Q10.
Momentum is a:
A) Scalar quantity
B) Vector quantity
C) Tensor quantity
D) Dimensionless quantity
Answer: B) Vector quantity
✔ Revise MCQs repeatedly before exams
✔ Helps in quick scoring and confidence building
👉 Next page: Assertion–Reason & Match-the-Following Questions
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