Question

2. Calculate the pressure exerted by a person
weighing 600 N when she is:
(i) Standing on her feet, with area of
contact between each foot and floor
being 0.0015 m.
(ii) Sitting on a chair with total area of
contact on the chair being 0.01 m.​

Answer 1

Answer:

Sure, I can help you with that.

**(i) Standing on her feet**

The pressure exerted by a person standing on her feet is calculated using the following formula:

```

Pressure = Force / Area

```

In this case, the force is the weight of the person, which is 600 N. The area of contact between each foot and the floor is 0.0015 m².

```

Pressure = 600 N / 0.0015 m²

= 40,000 Pa

```

Therefore, the pressure exerted by the person standing on her feet is 40,000 Pa.

**(ii) Sitting on a chair**

The pressure exerted by a person sitting on a chair is calculated using the same formula. In this case, the total area of contact on the chair is 0.01 m².

```

Pressure = 600 N / 0.01 m²

= 60,000 Pa

```

Therefore, the pressure exerted by the person sitting on a chair is 60,000 Pa.

As you can see, the pressure exerted by a person is greater when the area of contact is smaller. This is because the force is being distributed over a smaller area, which results in a higher pressure.