Physics (AS & A Level) · Oct / Nov 2023 · Paper 12 · Question 3
A student takes measurements to determine the constant acceleration of a model car moving from rest in a straight line. The measured values with their absolute uncertainties are shown. | quantity | measured value | uncertainty | |---|---|---| | displacement | 16.5 m | ± 0.1 m | | time | 15.0 s | ± 1.0 s | The student uses the equation s = ½at² to calculate the acceleration of the car. What is the acceleration and its absolute uncertainty?
- A(0.11 ± 0.01) m s⁻²
- B(0.11 ± 0.02) m s⁻²
- C(0.15 ± 0.01) m s⁻²
- D(0.15 ± 0.02) m s⁻²
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Correct answer: D. (0.15 ± 0.02) m s⁻²
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