Q: What mistakes do candidates make on this AQA GCSE question?

✗ Dividing the original length by the change.\n✗ Forgetting to multiply by 100 to get a percentage.\n✗ Using the new length instead of the change in length.

Question 1

Figure 12 shows a diving board at the side of the swimming pool. The original length of the spring is 0.84 m. When the child stands on the diving board, the length of the spring decreases by 0.21 m.

Calculate the percentage change in the length of the spring.

Accepted Answer

To calculate a percentage change, you use the formula:
Percentage change = (change / original value) × 100.
1. Identify the "change in length".
2. Identify the "original length".
3. Substitute these into the formula and calculate the result.

Question 2

What mistakes do candidates make on this AQA GCSE question?

Accepted Answer

✗ Dividing the original length by the change.
✗ Forgetting to multiply by 100 to get a percentage.
✗ Using the new length instead of the change in length.

Figure 12 shows a diving board at the side of the swimming pool. The original length of the spring is 0.84 m. When the child stands on the diving board, the length of the spring decreases by 0.21 m.
<br><br>
Calculate the percentage change in the length of the spring.

How to approach this question

Full Answer

Common mistakes

Practice the full AQA GCSE Physics Foundation Tier Paper 2

More questions from this exam