A-LevelMathematicsMechanics9709/42 · May/June 2021 · Q13 Marks
A particle of mass 0.6 kg is projected with a speed of 4 m s⁻¹ down a line of greatest slope of a smooth plane inclined at 10° to the horizontal.
- Use an energy method to find the speed of the particle after it has moved 15 m down the plane.[3]
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [B1] Any one of the three expressions correct
- [M1] Apply energy equation, 3 terms, dimensions correct
- [A1] v=8.25 ms⁻¹
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