1. Friction 3 a) Why should you oil the axles of a bicycle?
7Kd
Friction
3 a) Why should you oil the axles of a bicycle?
b) Why must you never put oil on the brake blocks of a bicycle?
c) Explain why bicycle brakes do not work very well in the rain.

2. Friction 3 a) Why should you oil the axles of a bicycle?
7Kd
Friction
3 a) Why should you oil the axles of a bicycle?
to reduce friction and make the bicycle go faster
b) Why must you never put oil on the brake blocks of a bicycle?
The oil reduces the friction between the brake blocks and the wheel so the brakes would not work.

3. 7Kd
Friction
3 c) Explain why bicycle brakes do not work very well in the rain.
The rain acts like a lubricant and reduces the friction between the brake blocks and the wheel.