Question

A girl weighing 50 kgf wears sandals of
pencil heel of area of cross section 1 cm²,
stands on a floor. An elephant weighing
2000 kgf stands on foot each of area of
cross section 25 cm?, on the floor.
Compare the pressure exerted by them.​

Answer 1

Answer:

Given:

• A girl weighing 50 kg wears sandals of pencil heel of area of cross section 1 cm², stands on a floor. An elephant weighing 2000 kg stands on foot each of area of cross section 25 cm?, on the floor.

Find:

• Compare the pressure exerted by them.

Using formula:

★ ${\sf{\underline{\boxed{\orange{\sf{Pressure = \dfrac{Force}{Area} }}}}}}$

★ ${\sf{\underline{\boxed{\orange{\sf{Force \: exerted = W= mxg}}}}}}$

• Let us assume F as force.

Calculations:

⇒ $\bold{F = 50 \times 10}$

⇒ ${\sf{\underline{\boxed{\red{\sf{500 \: N}}}}}}$

⇒ $\bold{Pressure = \dfrac{500}{0.0001}}$

⇒ ${\sf{\underline{\boxed{\pink{\sf{5000000 \: Pa}}}}}}$

⇒ $\bold{Force \: exerted = 200 \times 10}$

⇒ ${\sf{\underline{\boxed{\red{\sf{2000 \: N }}}}}}$

• Area = 250 cm² = 0.025 m²

⇒ $\bold{Pressure = \dfrac{2000}{0.025}}$

⇒ ${\sf{\underline{\boxed{\pink{\sf{80000 \:Pa }}}}}}$