AQA Paper 1 Specimen — Question 15 8 marks

Exam BoardAQA
ModulePaper 1 (Paper 1)
SessionSpecimen
Marks8
TopicDifferential equations

15 The height \(x\) metres, of a column of water in a fountain display satisfies the differential equation \(\frac { \mathrm { d } x } { \mathrm {~d} t } = \frac { 8 \sin 2 t } { 3 \sqrt { x } }\), where \(t\) is the time in seconds after the display begins. 15
  1. Solve the differential equation, given that initially the column of water has zero height.
    Express your answer in the form \(x = \mathrm { f } ( t )\)
    [0pt] [7 marks]
    15
  2. Find the maximum height of the column of water, giving your answer to the nearest cm .
    [0pt] [1 mark]