Question

02. A girt weighting 90 kg is standing on pencil heels, each having an area of cross-section of 1 cm'sq. An elephant weighing 3000 kg and foot area of cross-section 250 cm sq, standing on the floor. Which of the two exerts more pressure of the floor? Given g = 10 m

Answer 1

The girl exerts more pressure on the force , because if the surface area decreases , pressure increases

Mathematically

Pressure =Force /Area

Force = Mass x acceleration

Force of girl = 90 x 10 =900 N

Pressure exerted by girl = 900/0.0001

9,00,00,000 Pa is exerted by girl

Elephant force = 3000 x 10 = 30,000 N

30,00/0.0025

1,20,00,000 Pa