Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

The orbital period $T$ of a satellite around the Earth is defined by $T = \sqrt{\frac{K R^3}{M}}$, where $R$ is the satellite’s distance from the Earth’s centre, $M$ denotes the Earth’s mass, and $K$ is a constant.
(a)[2]

Determine the SI base units for $K$.

(b)[4]

The data for one satellite are shown in Fig. 2.1. Calculate $K$ and its actual uncertainty in SI units.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: The correct SI units are: $T$ in s, $R$ in m, and $M$ in kg

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