Question

Question 61:
An elephant weighing 40,000 N stands on one foot of area 1000 cm2 whereas a girl weighing 400 N is standing on one ‘stiletto’ heel of area 1 cm2.
Lakhmir Singh Physics Class 9

Answer 1

Answer:

question is incomplete please say what to find

Answer 2

Answer:

Pressure from girl's heel > Pressure from Elephant

Explanation:

In the question,

Weight of the Elephant = 40,000 N

Area of the foot of the elephant = 1000 cm².

Weight of the girl = 400 N

Area of stiletto heel of the girl = 1 cm².

Now,

We know that Pressure is,

$P=\frac{F}{A}$

So,

Pressure of Elephant is,

$P=\frac{40,000}{1000\times 10^{-2}\times10^{-2}} \\Because,\\1\ cm^{2}=10^{-4}\ m^{2}\\So,\\P=400,000\ N/m^{2}$

Also,

Pressure of Girl's heel is,

$P=\frac{400}{10^{-4}}\\P=4000,000\ N/m^{2}$

Therefore, the pressure generated by girl's heel is more than that of generated by Elephant's heel.