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Figure 10 shows a toy used to launch a ball - Edexcel - GCSE Physics - Question 4 - 2020 - Paper 1
Question 4
Figure 10 shows a toy used to launch a ball. One end of the spring is fixed to the handle. The other end of the spring is fixed to the support. (a) A child pulls th... show full transcript
Worked Solution & Example Answer:Figure 10 shows a toy used to launch a ball - Edexcel - GCSE Physics - Question 4 - 2020 - Paper 1
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(i) The extension of the spring is 0.09m. The spring constant (k) is 20N/m. Calculate the work done in extending the spring by 0.09m. Use the equation work done = ½ × k × (extension)².
Answer
Using the work done formula, we have:
ext{work done} = rac{1}{2} imes k imes ( ext{extension})^2 = rac{1}{2} imes 20 imes (0.09)^2 = 0.081 ext{ J}Thus, the work done is 0.081 J.
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(ii) The child lets go of the handle. The ball starts to move. The spring returns to its original length. Describe the energy transfer that takes place when the ball starts to move.
Answer
When the child lets go of the handle, the potential energy stored in the stretched spring is converted into kinetic energy. As the spring returns to its original length, it propels the ball, transferring kinetic energy to the ball, causing it to move.
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(iii) The child can only stretch the spring until the pad is pressing against the support. Explain how the design of the toy prevents the spring from becoming damaged.
Answer
The design limits the extension of the spring, ensuring that it does not exceed its elastic limit. This prevents the spring from being overstretched or damaged, allowing it to return to its original shape without permanent deformation.