1Why is a wide foundation made when a house is built?
2The feet of a camel that walks in the desert are broad. How does this help the camel to walk on desert sand?
3Why does a shoe with a pointed heel sink further into muddy ground than a flat, wide shoe?
4Pressing the pointed end of a ball pen on the wrist hurts more than pressing the blunt end with the same push. Why?
5How far does the foam sink when a brick is laid on its broad face and when the same brick is stood on its narrow face? What conclusion can be drawn?
6A cupboard weighing 1800 N covers 1.5 m². What pressure does it put on the floor, and what is the pressure when the same cupboard is placed so that it covers 3 m²?
7What is pressure? Write its unit and explain what one pascal of pressure means.
8A box weighing 500 N covers 0.25 m² of the floor. What pressure does it put on the floor?
9Why are heavy goods trucks given many wheels at the back?
10Give the scientific reason why a ploughshare and the tip of a nail are made sharp.