We know Pressure = Force / Area

If 50 N force is applied on a liquid and it experiences 25 N/m² pressure.

Find out the area on which the force is applied?

List out the following actions on the basis of contact force and non contact force

a) lifting a chair

b) the falling of a coconut from the tree

c) friction between the road and the tyre of a car

d) a comb attracts bits of paper

e) attraction between two magnets

By observing the diagram, answer the following.

a) How does the pressure at A differ from the pressure at B.?

b) The pressure at B is greater than the pressure at D. Is it true?. Justify your answer.

c) Compare the pressure at A and C.

d) If the water is replaced with mercury, how would this affect the pressure at A and D?

Aswin and Anwar were playing with four bricks each. Aswin arranged his four bricks as shown in figure A. Anwar arranged his bricks as shown in figure B, in order to be a taller one.

Now let us complete the following sentences by choosing the right option below

(equal to, less than, more than)

a) The force of A on the ground is _________ the force of B on the ground.

b) The area that A occupies is ________ B on the ground.

c) The pressure exerted by A is _______ the pressure exerted by B.

We know that pressure can also be calculated by using the formula p=hdg

A rectangular storage tank is filled with paraffin. The height of the tank is 2m. Density of paraffin is 800 kg/m3, the value of g is 10 m/s² Calculate

a) the pressure at the bottom of the tank

b) the pressure at a depth of 1 m.