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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 2 - Edexcel - GCSE Physics - Question 2 - 2020 - Paper 1
Question 2
A student lifts a toy car from a bench and places the toy car at the top of a slope as shown in Figure 2. (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 2 - Edexcel - GCSE Physics - Question 2 - 2020 - Paper 1
Step 1
Describe an energy transfer that occurs when the student lifts the toy car from the bench.
Answer
When the student lifts the toy car from the bench, there is a transfer of energy from the student's muscles to the car. The energy transferred is in the form of gravitational potential energy (GPE), which is stored in the toy car as it is raised to a higher position. This process converts the chemical energy from the student's body into gravitational potential energy of the toy car.
Step 2
Describe how the student could find, by experiment, the speed of the toy car at the bottom of the slope.
Answer
To determine the speed of the toy car at the bottom of the slope, the student could conduct the following steps:
- Measure the distance: The student should measure the distance along the slope from the top to the bottom where the car travels.
- Measure the time: The time taken for the toy car to roll down the slope can be measured using a stopwatch.
- Calculate speed: The speed can be calculated using the formula:
- Repetition for accuracy: To ensure accuracy, the student should repeat the experiment multiple times and take the average speed from the trials. This helps to account for any variations in time measurements.