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A-LevelMathematicsMechanics9709/52 · Oct/Nov 2018 · Q13 Marks

A small ball B is projected with speed 38 m s⁻¹ at an angle of 30° to the horizontal from a point on horizontal ground. Find the speed of B when the path of B makes an angle of 20° above the horizontal.

  1. (a)A small ball B is projected with speed 38 m s⁻¹ at an angle of 30° to the horizontal from a point on horizontal ground. Find the speed of B when the path of B makes an angle of 20° above the horizontal.[3]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.

  1. [M1] Equate initial horizontal velocity to final horizontal velocity
  2. [A1] vcos20 = 38cos30
  3. [A1] v = 35(.0) m s⁻¹

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About this question

Topic
Mechanics, A-Level Mathematics (syllabus 9709). Structured question, 3 marks.
Source
A-Level Mathematics, Oct/Nov 2018 Paper 5 Variant 2, question 1.

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