Answer:
(a)
Pressing the flat end of a ball point pen against the hand with some force and
pressing the pointed tip of the same pen against the hand with the same force.
Pressing on pointed tip produces greater pain because the area on which same
force acts decreases and the effect of this force increases.
The total force acting on an area is called thrust whereas the force
acting per unit area is called pressure. Thrust has the same SI Unit of Newton
as force.
(b) The pressure exerted will be more when the block with
its face.
Pressure Force
When 20 cm x 10 cm is kept on the table:
Pressure
When the block is kept on the table with its face 40 cm x
20 cm,
Pressure
You need to login to perform this action.
You will be redirected in
3 sec