Question

A person whose mass is 50 kg has a surface area on one foot of 0.01 square meters. What pressure does the person exert on the ground when standing on two legs?

Option 1: 5000 Pa
Option 2: 2500 Pa
Option 3: 10000 Pa
Option 4: 12500 Pa

Answer 1

The pressure exerted on the ground when standing on two legs is 24,500 Pa.

Step-by-step explanation:

In order to calculate the pressure exerted on the ground when standing on two legs, we need to use the formula for pressure: pressure = force / area.

First, we need to calculate the force exerted on the ground, which is equal to the weight of the person. The weight is calculated by multiplying the mass (50 kg) by the acceleration due to gravity (9.8 m/s²): weight = mass * acceleration due to gravity = 50 kg * 9.8 m/s² = 490 N.

Next, we need to calculate the area of both feet. Since the person is standing on two legs, the surface area is the sum of the areas of the two feet: area = 2 * 0.01 m² = 0.02 m².

Now, we can calculate the pressure by dividing the force by the area: pressure = force / area = 490 N / 0.02 m² = 24,500 Pa.

So, the correct answer is Option 4: 24,500 Pa.