Units (Forces and Motion)
2 marks · HardWrite the SI unit and symbol for each of the following: (i) distance, (ii) time, (iii) mass, (iv) force, (v) acceleration, (vi) momentum, and (vii) moment of a force.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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Distance: metre (m); Time: second (s); Mass: kilogram (kg); Force: newton (N); Acceleration: metre per second squared (m/s²); Momentum: kilogram metre per second (kg m/s); Moment: newton metre (N m)
Must show: m, s, kg, N, m/s², kg m/s, N m
Common mistakes: missing symbols; using wrong symbols
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Gives correct SI units and symbols for at least 4 of the 7 quantities.
B2 · 1 mark · All 7 quantities have correct SI unit and correct symbol.
Worked solution
Distance: metre (m). Time: second (s). Mass: kilogram (kg). Force: newton (N). Acceleration: metre per second squared (m/s²). Momentum: kilogram metre per second (kg m/s). Moment: newton metre (N m).