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A student lifts a toy car from a bench and places the toy car at the top of a slope as shown in Figure 1 - Edexcel - GCSE Physics Combined Science - Question 1 - 2020 - Paper 1
Question 1
A student lifts a toy car from a bench and places the toy car at the top of a slope as shown in Figure 1. (a) Describe an energy transfer that occurs when the stude... show full transcript
Worked Solution & Example Answer:A student lifts a toy car from a bench and places the toy car at the top of a slope as shown in Figure 1 - Edexcel - GCSE Physics Combined Science - Question 1 - 2020 - Paper 1
Step 1
Describe an energy transfer that occurs when the student lifts the toy car from the bench and places the toy car at the top of the slope.
Answer
When the student lifts the toy car from the bench to the top of the slope, there is a transfer of energy from the student to the toy car. This transfer involves the conversion of chemical potential energy from the student's body (due to the food they have consumed) into gravitational potential energy (GPE) as the toy car is raised to a higher position. This means that energy is stored in the toy car as gravitational potential energy at the top of the slope.
Step 2
The student lets the toy car roll down the slope.
Answer
To measure the motion of the toy car rolling down the slope, the following details must be recorded:
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Distance Measurement: Measure the distance the toy car travels down the slope. This can be done by marking the starting point and the point where the car stops and measuring the length of the slope.
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Time Measurement: Use a stopwatch to time how long it takes for the toy car to travel down the slope.
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Calculation of Speed: Use the formula for speed, which is given by:
This gives you the average speed of the toy car down the slope.
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Detailing the Process: Ideally, record multiple trials to ensure accuracy. For example, measure the speed at two points: once at the top and once at the bottom of the slope for reliability.