Momentum & Impulse is one of 10 topics in the Grade 12 Physical Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. Momentum is defined by which formula?
p = mv
p = mv^2
p = m/v
p = Fv
Answer: p = mv — Momentum is the product of mass and velocity: p=mv, a vector quantity in the same direction as the velocity.
Easy
2. A 0,5 kg ball moves at 12 m⋅s−1. Calculate its momentum in kg⋅m⋅s−1.
Answer: 6 — p=mv=0,5×12=6 kg⋅m⋅s−1.
Easy
3. Which SI unit is equivalent to kg⋅m⋅s−1, the unit of momentum?
N·s
N·m
J·s
W·s
Answer: N·s — Since F=ma has units N=kg⋅m⋅s−2, multiplying by seconds gives N⋅s = kg⋅m⋅s−1, the same as momentum's unit.
