Question

- Both expansion and contraction are useful in
fitting an iron rim on a wooden wheel. Justify.​

Answer 1

Explanation:

The iron rim used is smaller when compared to wooden wheel. The iron rim is heated so that it expands and when the size of the rim is larger than wooden wheel,the iron rim is slipped on the wooden wheel. When the iron rim cools, it contracts and holds the wooden wheel tighter and gets fitted on the wooden wheel.