Question

13 The pressure of the atmosphere is 100 000 Pa
a Calculate the force with which the atmosphere presses on the outside of a large window 2.0m
high and 1.25m wide.
bExplain why this force does not break the window.

Answer 1

P= F/A
F= P/A. A=1.25*2= 1.5m^2
F= 100000/ 1.5m^2
F=41666 N

It doesnt break bc there is an equal force exerted from the plane

Answer 2

Question:-

(A) The pressure of the atmosphere is 100000 Pa Calculate the force with which the atmosphere presses on the outside of a large window 2.0m high and 1.25m wide.

(B) Explain why this force does not break the window.

Answer:-

(A)

As we know

$Formula -> pressure = {force} \times area$

Given->

Pressure-> 1atm

height-> 2 m

wide -> 1.25 m

Putting value in formula ->

$100000 = force \times(h \times w) \\ 100000= force \times 2 \times 1.25 \\ force = \frac{100000}{2 \times 1.25}\\ force = {4×10000}\\ force = 40000\: newton \: (N)$

(B) Because atmosphere is present on both sides of the window pane so same force is applied from both sides of the window and as we know force is a vector quantity so according to the vector sum the force got cancelled out and net force becomes zero .

That's why even in presence of this amount of force window glass donot break