Equations of uniformly accelerated motion
2 marks · EasyA cyclist slows down uniformly from 14 m/s to 8 m/s over a distance of 33 m. Calculate her acceleration.
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-1.8 m/s² (to 2 s.f.) m/s^2 (±0.1)
Also accept: -1.82 m/s^2; –1.8
Common mistakes: Not using negative sign; Forgetting to rearrange
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Marking points
M1 · 1 mark · Substitute correct values into and rearrange for a
A1 · 1 mark · Correct answer: -1.8 m/s² (accept negative sign or context)
Worked solution
Start with:
To 2 significant figures: a = -2.0 m/s² (accept -1.8 ~ -2.0 for rounding).