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A-LevelMathematicsMechanics9709/41 · Oct/Nov 2019 · Q12 Marks

A crane is lifting a load of 1250 kg vertically at a constant speed Vm s⁻¹. Given that the power of the crane is a constant 20 kW, find the value of V.

  1. A crane is lifting a load of 1250 kg vertically at a constant speed Vm s⁻¹. Given that the power of the crane is a constant 20 kW, find the value of V.[2]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2019). The mark or mark type is shown in brackets.

  1. [M1] Use of P = Fv with F = mg
  2. [A1] V = 1.6

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About this question

Topic
Mechanics, A-Level Mathematics (syllabus 9709). Structured question, 2 marks.
Source
A-Level Mathematics, Oct/Nov 2019 Paper 4 Variant 1, question 1.

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