Photo AI
The picture shows the brake of a bicycle - Junior Cycle Science - Question a - 2014
Question a
The picture shows the brake of a bicycle. When the cyclist wishes to slow down, she pulls a lever which pushes the rubber brake-pad against the rim of the wheel. Ex... show full transcript
Worked Solution & Example Answer:The picture shows the brake of a bicycle - Junior Cycle Science - Question a - 2014
Step 1
Explain why the brakes may not work as well after it has been raining.
Answer
When it has been raining, water can accumulate on the bicycle's brake pads and the rim of the wheel. This water acts as a lubricant, reducing the friction between the brake pads and the rim.
Friction is essential for the brakes to work effectively, as it allows the brake pads to grip the rim of the wheel. If there is insufficient friction due to the presence of water, the brakes will not grip as tightly, leading to reduced stopping power.
Additionally, wet conditions can cause contaminants or debris to settle on the brake components, further impairing their efficiency. Therefore, after rain, the brakes may not provide the necessary resistance, making it difficult for the cyclist to slow down or stop safely.