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Question 10 This question is about engineering analysis in the design process. A student wants to design a spring-loaded device to fire squash balls at a target up to 6m away. As part of this process, she calculates that the ball should reach a height of 2m above the launch position. The squash ball has a mass of 25g. The spring she is using has a stiffness 100Nm?¹. a) By considering energy transfer from stored spring energy to gravitational potential energy, estimate the distance she will have to compress the spring in order to have the ball reach a height of 2m. [4 marks] b) List any assumptions you have made in part (a). [2 marks] c) Sketch a mechanism for compressing, locking, and then releasing the spring. [4 marks] [total: 10 marks] [End of paper]

          Question 10
This question is about engineering analysis in the design process.
A student wants to design a spring-loaded device to fire squash balls at a target up to 6m
away.
As part of this process, she calculates that the ball should reach a height of 2m above the
launch position. The squash ball has a mass of 25g. The spring she is using has a stiffness
100Nm?¹.
a)
By considering energy transfer from stored spring energy to gravitational potential
energy, estimate the distance she will have to compress the spring in order to have the ball
reach a height of 2m.
[4 marks]
b)
List any assumptions you have made in part (a).
[2 marks]
c)
Sketch a mechanism for compressing, locking, and then releasing the spring.
[4 marks]
[total: 10 marks]
[End of paper]

Question 10
This question is about engineering analysis in the design process.
A student wants to design a spring-loaded device to fire squash balls at a target up to 6m
away.
As part of this process, she calculates that the ball should reach a height of 2m above the
launch position. The squash ball has a mass of 25g. The spring she is using has a stiffness
100Nm?¹.
a)
By considering energy transfer from stored spring energy to gravitational potential
energy, estimate the distance she will have to compress the spring in order to have the ball
reach a height of 2m.
[4 marks]
b)
List any assumptions you have made in part (a).
[2 marks]
c)
Sketch a mechanism for compressing, locking, and then releasing the spring.
[4 marks]
[total: 10 marks]
[End of paper]

Added by George B.

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