Question

1.       The surface area of the end of a brick is 50cm2. The surface area of the base of another brick is 200cm2. Each brick weighs 50N. What pressure each of the brick exerts on the ground?​

Answer 1

Answer:

Given,

Surface area, A = 50 cm2 = 50 × 10-4 m2.

Force exerted by the brick, F = 50 N.

(a) Pressure on the ground, P = F/A = 50/(50 × 10-4) = 104 N/m2.

(b) The pressure is dependent only on force and surface area on which force is exerted. It is not dependent on the type of material used.

So, if the block of wood and brick both have same surface area (surface area of the face touching the ground) and same weight then the pressure would be same.

Answer 2

Answer:

Pressure on the ground, P = F/A = 50/(50 × 10-4) = 104 N/m2.

Explanation:

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