Forces Flashcards
What is the formula for moment
moment = force x distance
The object that turns is called a
lever
The point at which an object turns is called a
pivot
Meaning of hollow in science
The object has space filled with air inside it
Moment is measured in
newton metre (Nm) It can also be in smaller units so newton plus the other unit. Eg Ncm
How to calculate density
Density = mass over volume
Explain why some materials sink and some float in water
If a material is more dense than water, it will sink. If it is less dense than water, it will float.
State the densities of particles in order ( Solids, Liquids and Gases )
Solids are the most dense because their particles are tighly packed
Liquids are next as they have some spaces in them
Gases are last because their particles are far apart.
What is the pattern of density in elements?
As you go down a group, the density increases. As you move across a period(left to right) the density increases.
