Question

A balloon is a sphere with a radius of 5.0 m. The force of air against the walls of the balloon is 45 N. What is the air pressure inside the balloon? (surface area = 12.56 x radius2; 1 Pa = 1 N/m2)

This is my question for my homework I am unsure how to solve it.

Answer 1

Pressure = Force / Area

Given Force = 45 N
Radius = 5 m

Therefore Surface area becomes : 12.56 * (Radius)^2 = 12.56 * (5 m)^2

You have area and force now, calculate the pressure :

\(Pressure = \cfrac{45 N}{12.56 \times (5 m)^2}\)

Answer 2

Yeah mathslover is right. 45N/314m^2 = .143 Pa

Answer 3

Yep. ^