A pressure of 10 Pa acts on an area of 3.0 m². What is the force acting on the area? What force will be exerted by the application of same pressure if the area is made one-third?

Why do camels have large flat feet?

Name these forces:

(a) The upward push of water on a submerged object.

(b) The force which wears away two surfaces as they move over one another

(c) The force which pulled the apple off Isaac Newton’s tree.

(d) The force which stops you falling through the floor.

A girl is wearing a pair of flat shoes. She weighs 550 N. The area of contact of one shoe with the ground is 160 cm². What pressure will be exerted by the girl on the ground?

(a) If she stands on two feet?

(b) If she stands on one foot?

Calculate the density of an object of volume 3 m³ and mass 9 kg. State whether this object will float or sink in water. Give reason for your answer.