Question

the weight of a man is 60kg and the area of his each foot is 30cm^2. Calculate pressure exerted by him on earth if he stands on (a) one foot (b)both feet. (g=10ms ^-2​

Answer 1

$\large\underline{\underline{\sf Given:}}$

• Weight of mass (m) = 60kg

• Area of each foot (A) = 30cm² convert it into meter

•°• 30cm² =$\sf{30×10^{-4}m^2}$

$\large\underline{\underline{\sf To\:Find:}}$

• Pressure excreted by him on earth if he stand on

(a) one foot = ?

(b) both feet = ?

$\large\underline{\underline{\sf Solution:}}$

We know ,

$\large{\boxed{\sf Pressure (P)=\frac{Force}{Area}}}$

Force (F) = Mass × g

$\implies{\sf F= 60×10}$

$\implies{\sf F=600N }$

(a) For One Foot Pressure (P) :

Area of one foot is = $\sf{30×10^{-4}m}$ (Given)

•°• $\large\implies{\sf P=\frac{600}{30×10^{-4}} }$

$\large\implies{\sf P=20000Pa }$

(b) For Two Feet Pressure (P)

Area of one foot is = $\sf{30×10^{-4}m}$

•°• Area of two feet will be = $\sf{30×10^{-4}×2}$

$\implies{\sf 60×10^{-4}m}$

$\large\implies{\sf P=\frac{600}{60×10^{-4}}}$

$\large\implies{\sf P=100000Pa}$

$\Large\underline{\underline{\sf Answer:}}$

•°• Pressure for 1 foot is 200000 Pa and Pressure for 2 feet is 100000 Pa.