Question

Who exerts more pressure

(a) A girl of 50 kg wearing heels with an area of cross section 1 sq. cm (b) An elephant of 4000 kg with foot area of each 250 sq.cm.

Answer 1

Answer A is correct.

Step-by-step explanation:

The formula of pressure is

• Pressure = Force / Area

So let's take Instance A.

• P = F / A
• Convert Mass into weight, so 50Kg × 10 = 500N
• P = 500N ÷ 1 sq.cm.
• P = 500N ÷ 0.0001sq.m
• P = 5,000,000Pa.

Now B.

• P = F / A
• Convert mass to weight, so 4000Kg×10 = 40,000N.
• P = 40000N ÷ 250sq.cm
• P = 40000N ÷ 0.025sq.m
• P = 1,600,000Pa

Since 5,000,000Pa > 1,600,000,

Instance A is correct .

Answer 2

The girl exerts more pressure.

Step-by-step explanation:

To determine who exerts more pressure, we compare the pressure exerted by the girl wearing heels and the pressure exerted by the elephant's foot.

(a) The girl exerts a pressure of approximately 4.9 * 10^6 Pascal (Pa).

(b) The elephant's foot exerts a pressure of approximately 1.568 * 10^6 Pa.

Comparing these pressures, we can see that the girl wearing heels exerts a higher pressure than the elephant's foot. Therefore, the girl exerts more pressure.

This can be attributed to the smaller cross-sectional area of the girl's heels compared to the larger foot area of the elephant. The same force (weight) is distributed over a smaller area in the case of the girl, resulting in higher pressure.