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 find the mean speed, we will apply the formula for the mean, which is the sum of the speeds divided by the number of measurements:
meanspeed=31.31+1.27+1.16=33.74=1.2467m/s
Rounding this value gives:
Mean speed ≈ 1.25 m/s.
Step 2
Suggest one reason why the measurements of speed were repeated.
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Answer
Repeating the measurements helps to identify any anomalous results, improving the reliability of the data.
Step 3
Calculate the change in the gravitational potential energy of the ball.
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Answer
Using the formula for gravitational potential energy change:
ΔGPE=m×g×Δh
We substitute in the known values:
m = 0.052 kg
g = 10 N/kg
Δh = 5.0 cm = 0.05 m
Thus, we calculate:
ΔGPE=0.052×10×0.05=0.026J
Step 4
Draw a ruler on Figure 15, placed in a position to measure the change in vertical height Δh.
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The ruler should be drawn vertically, ensuring that it shows the minimum vertical distance through which the ball moves.
Step 5
Describe how the measurement of the change in vertical height, Δh, could be improved using the set square.
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To improve measurement accuracy, the set square can be placed against the ruler to ensure it is vertical. This ensures precise positioning for the height measurement and reduces parallax error when reading the ruler.
