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Momentum formula:
p = ma
p = mv
p = mg
p = ½mv²
Answer & explanation
Correct: option B
p = mass × velocity.
Unit of momentum:
N
kg·m/s
J
m/s²
kg × m/s = kg·m/s.
A 4 kg ball moves at 8 m/s. Momentum?
0.5 kg·m/s
12 kg·m/s
32 kg·m/s
256 kg·m/s
Correct: option C
p = 4 × 8 = 32 kg·m/s.
Momentum is a:
Scalar
Vector
Constant
Force
Vector — has magnitude AND direction.
A stationary 1000 kg car has momentum:
1000 kg·m/s
0 kg·m/s
Cannot calculate
Negative
p = mv; v = 0 → p = 0.
Which has greater momentum?
1 kg ball at 10 m/s
1000 kg car at 5 m/s
Equal
Cannot tell
Car: 1000 × 5 = 5000. Ball: 1 × 10 = 10. Car wins by 500×.