MOMENTUM
2 marks · Easy(a)[1 mark]
State the equation linking force, change in momentum, and time.
(b)[1 mark]
Give the SI unit of momentum.
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(a) F = change in momentum / time
(b) kg m/s
Common mistakes: Wrong arrangement of the equation; Wrong units (e.g., N or m/s instead of kg m/s)
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Correct formula: F = change in momentum / time (or F = (mv - mu) / t)
B1 (b) · 1 mark · Correct SI unit for momentum: kg m/s
Worked solution
a) The equation is: F = change in momentum / time.
b) The SI unit for momentum is kilogram metre per second (kg m/s).