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, sum the individual speeds and divide by the number of measurements:
mean speed=31.31+1.27+1.16
Calculating gives:
mean speed=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, allowing for the identification of anomalous results which might affect the overall accuracy of the speed.
Step 3
Calculate the change in the gravitational potential energy of the ball.
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Answer
Using the given equation,
ΔGPE=m×g×Ah
Substituting the values:
ΔGPE=0.052×10×(0.05)
This gives:
ΔGPE=0.026 J
Step 4
Draw a ruler on Figure 15, placed in a position to measure the change in vertical height Ah.
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The ruler should be drawn vertically next to the path of the ball, clearly indicating the vertical distance it travels (5.0 cm).
Step 5
Describe how the measurement of the change in vertical height, Ah, could be improved using the set square.
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To improve measurement accuracy using the set square, position one edge of the set square against the ruler at a right angle. This ensures the ruler is vertical, allowing for a precise measurement of the vertical distance.
