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8 Energy – forces doing work

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Question 44
F

A bungee jumper steps off a platform.

The Figure shows the jumper at three positions, A, B and C.

Figure

image

a.

Describe the changes in the energy stores of the jumper as the jumper falls from A to B.

[2]
b.

Describe the changes in the energy stores as the jumper moves from B to C.

[3]
c.

From A to C, the gravitational store of the jumper decreases by 36 000 J36\,000\ \text{J}36000 J.

At C, the elastic store of the cord is 34 500 J34\,500\ \text{J}34500 J.

Calculate the energy transferred to thermal stores between A and C.

[2]
d.

After reaching C, the jumper moves back up.

Explain why the jumper does not return to the height of the platform.

[2]
Markscheme

8 Energy – forces doing work Questions

  1. GCSE
  2. /Physics
  3. /8 Energy – forces doing work

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