Ch 3C Pressure#

Question 1

What is the formula for pressure?

Answer 1

Pressure = force / contact area
(P = F/A)

Question 2

What is the SI unit for pressure?

Answer 2

N/m^{2 otherwise known as Pascal (Pa)}

Question 3

What is 1 cm² converted to m²?

This is a recap as you need to able to convert between them for use in the pressure formula.

Answer 3

0.0001 m²

Question 4

Define pressure.

Answer 4

It is the force acting per unit area.

Question 5

Explain why tools for cutting such as knives have sharp edges.

Use the concept of pressure to explain.

Answer 5

Sharp edges have small contact area with the cutting surface
and exert a high pressure on the objects so that they can be cut easily.