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Date May 2017 Marks available 2 Reference code 17M.2.AHL.TZ1.H_11
Level Additional Higher Level Paper Paper 2 Time zone Time zone 1
Command term Find Question number H_11 Adapted from N/A

Question

Xavier, the parachutist, jumps out of a plane at a height of hh metres above the ground. After free falling for 10 seconds his parachute opens. His velocity, vms1vms1, tt seconds after jumping from the plane, can be modelled by the function

v(t)={9.8t,0t10981+(t10)2,t>10

His velocity when he reaches the ground is 2.8 ms1.

Find his velocity when t=15.

[2]
a.

Calculate the vertical distance Xavier travelled in the first 10 seconds.

[2]
b.

Determine the value of h.

[5]
c.

Markscheme

* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.

v(15)=981+(1510)2     (M1)

v(15)=19.2 (ms1)     A1

[2 marks]

a.

1009.8tdt    (M1)

=490 (m)     A1

[2 marks]

b.

981+(t10)2=2.8     (M1)

t=44.985 (s)     A1

h=490+44.9...10981+(t10)2dt    (M1)(A1)

h=906 (m)     A1

[5 marks]

c.

Examiners report

[N/A]
a.
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b.
[N/A]
c.

Syllabus sections

Topic 5 —Calculus » SL 5.9—Kinematics problems
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Topic 5 —Calculus

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