Question

A girl weighing 50kgwt wears a sandal of pencil heel each of area of cross section 1cm2, she stands on a floor. An elephant weighing 2000kgwt stands on foot each of area of cross section 250cm2, on the floor. Who pressure is more?

Answer 1

Answer:

girl's heels pressure is more.

Explanation:

we know that, 1kgwt = 10N

pressure = force / area  

and 1cm² = 10^-4 m²

1N/m² = 1Pa

weight of girl = 50kgwt = 500N

area of 2 heels = 2 x 1cm² = 2x10^-4 m²

pressure = force / area = 500/(2x10^-4)

pressure = 250 x 10^4Pa = 2.5 x 10^6 Pa

weight of elephant = 2000kgwt = 20000N = 2 x 10^4N

area of 4 feet = 4 x 250 = 1000cm² = 0.1m²

pressure = force / area = (2x10^4) / 0.1

pressure = 2 x 10^5 Pa

The Pressure exerted by girl's heels is more

             Hope it helps you.

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