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3.5 Differentiation (A-level only)

3.5 Differentiation (A-level only)

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Question 148

A profile for a streamlined racing drone winglet, symmetric about the xxx-axis, is designed using a Cartesian coordinate system. The upper boundary of the winglet is defined by the parametric equations:

x=−1.6t2 x = -1.6t^2 x=−1.6t2 y=16t−0.8t2 y = 16t - 0.8t^2 y=16t−0.8t2

for 0≤t≤200 \le t \le 200≤t≤20, where x x\,x and y y\,y are measured in millimetres.

a.

Determine the total length of the winglet along the xxx-axis.

[2]
bi.

Find an expression for dydx\displaystyle \frac{dy}{dx}dxdy​ in terms of ttt.

[2]
bii.

Hence, show that the maximum width of the winglet is exactly one-quarter of its total length.

[3]
Markscheme

3.5 Differentiation (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.5 Differentiation (A-level only)

263 exam-style questions on CCEA A Level Maths 3.5 Differentiation (A-level only), covering 3.5.1 Differentiation (A-level only), 3.5.2 Differentiation (A-level only), 3.5.3 Differentiation (A-level only), 3.5.4 Differentiation (A-level only), 3.5.5 Differentiation (A-level only), and 3.5 Differentiation (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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