FORCE, MASS AND ACCELERATION
3 marks · NormalA skateboarder of mass 60 kg pushes off the ground and accelerates at 0.80 m/s^2. Calculate the resultant force acting on the skateboarder. Show your working.
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Show answer
48 N (±0.5)
Must show: Correct substitution and working, Correct unit
Common mistakes: Omitting unit; Arithmetic errors
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Writes correct equation F = m x a (or equivalent).
M2 · 1 mark · Substitutes m = 60 kg, a = 0.80 m/s^2. (follow-through)
A1 · 1 mark · Obtains final answer 48 N, with correct unit. (follow-through)
Worked solution
Use the relationship F = m x a.