Explanation:
Pressure is force per unit area. Mathematically, we can write Pressure as follows:
[tex]P = \frac{F}{A} [/tex] --- (1)
Where P = Pressure = ?
F = Force = 140N
A = Area = 2.0m²
Plug in the values in (1):
P = 140/2.0
P = 70 N/m²
(2) The air particles in the inflated balloon are in chaotic motion. They are moving randomly and colliding with each other and with the inner wall of the balloon, exerting pressure on the wall of the balloon. Furthermore, they are far apart from each other, which is why when you squeeze the balloon, its shape changes accordingly as long as you are putting pressure on it while squeezing.