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Determine the value of $m$.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
An athlete of mass $m\,\text{kg}$ is moving on a level road and experiences a constant resistance force of magnitude $24\,\text{N}$. As he increases his speed from $5\,\text{m s}^{-1}$ to $6\,\text{m s}^{-1}$ over a distance of $50\,\text{m}$, the total work done by the athlete is $1541\,\text{J}$.
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This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct kinetic energy expression before or after, for example $KE=\tfrac12 mv^2$ with the correct speed” …
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