This question is about energy transfers - Edexcel - GCSE Physics - Question 6 - 2023 - Paper 2
Question 6
This question is about energy transfers.
Figure 13 shows the apparatus used for investigating the transfer between gravitational potential energy and kinetic energy... show full transcript
Worked Solution & Example Answer:This question is about energy transfers - Edexcel - GCSE Physics - Question 6 - 2023 - Paper 2
Step 1
Calculate the mean speed.
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Answer
To calculate the mean speed, we take the sum of the individual speeds and divide by the number of measurements.
The speeds recorded are: 1.31 m/s, 1.27 m/s, and 1.16 m/s.
Calculating:
extmeanspeed=31.31+1.27+1.16=33.74=1.25 m/s
Step 2
Suggest one reason why the measurements of speed were repeated.
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Answer
One reason for repeating the measurements is to improve reliability, as having multiple measurements allows for the identification of any anomalous results and ensures more precise average values.
Step 3
Calculate the change in gravitational potential energy.
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Answer
The change in gravitational potential energy (ΔGPE) can be calculated using the formula:
ΔGPE=m×g×Δh
Substituting the values:
Mass (m) = 0.052 kg
Gravitational field strength (g) = 10 N/kg
Change in height (Δh) = 5.0 cm = 0.05 m
Calculating:
ΔGPE=0.052×10×0.05=0.026 J
Step 4
To measure the change in vertical height, Δh.
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Answer
Draw a ruler vertically aligned with the ball in position to measure the height. Indicate the minimum vertical distance of 5 cm that the ball falls.
Step 5
Describe how the measurement of the change in vertical height, Δh, could be improved using the set square.
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Answer
The measurement can be improved by placing a set square against the ruler to ensure that the vertical position is accurately measured. One edge of the set square should be aligned at a right angle to the ruler, ensuring that it remains vertical, which enhances the precision of the height measurement.
