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A driver drives a car along a road - OCR Gateway - GCSE Physics (Combined Science) - Question 5 - 2023 - Paper 12
Question 5
A driver drives a car along a road. The driver presses the brakes to stop. Energy is transferred between stores. Kinetic store of car Thermal store of surrounding... show full transcript
Worked Solution & Example Answer:A driver drives a car along a road - OCR Gateway - GCSE Physics (Combined Science) - Question 5 - 2023 - Paper 12
Step 1
How is the energy transferred between these stores?
Answer
The energy transfer during braking involves the kinetic energy of the moving car being converted into thermal energy due to friction between the brakes and the wheels. This conversion occurs through two mechanisms:
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Work Done by Forces: The brakes exert a force on the wheels, causing a deceleration of the car. This work done by these forces changes the kinetic energy into thermal energy.
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Heating: The friction generated between the braking system and the wheel produces heat, which increases the thermal energy of the surroundings.
Thus, the correct answer is C) Work done by forces and by heating.