Forces and Matter

Question 1

What is the load of a spring?

Answer 1

➢ The weights hung on the end of the spring are referred as the load.

Question 2

What happens when Stretching a spring?

Answer 2

➢ The spring deforms elastically
➢ It will return to its original length as the load is removed
➢ If the load to too great, the spring will stay damaged (inelastically deformed).

Question 3

What is the Limit of proportionality?

Answer 3

➢ the point beyond which Hooke’s law is no longer true when stretching a material.

Question 4

HOOKES LAW

Answer 4

➢ The extension of a spring is proportional to the load applied to it, provided the limit of proportionality is not exceeded
➢ Load (F) = Spring constant (k) x extension of thee spring (x)

Question 5

What is Pressure?

Answer 5

The force acting per unit area at a right angles to a surface\

Question 6

Pressure Formulas

Answer 6

Pressure = Force/Area
Pressure = Depth x Density x acceleration due to gravity

Unit = Pascal (Pa), Pa = N/m^2

Question 7

Properties of pressure in liquids

Answer 7

• The deeper you go the more pressure
• Pressure depends on the density of the liquid
• Pressure doesn’t depend upon the shape of the container

Question 8

Air pressure

Answer 8

• Air pressure in atmosphere acts in all directions
• Air pressure gets less as you rise up through the atmosphere. the atmosphere is denser than lower levels.
• At sea level the atmospheric pressure is about 100kPa