Ch 8 Forces In Action Flashcards
Contact Force
When one object comes in contact with another object
• Brushing your hair
•Hitting a golf ball
• kicking a soccer ball
No Contact Force
The motion and shape or objects can be changed without touching anything.
• Dropping a tennis ball
• Dropping a pen
•Dropping a pencil
Gravity
The force of gravity pulls down, Gravity is a non-contact force
Other types of non-contact force involve Magnetic force and electro static force.
Permanent Magnets
Permanent magnets are magnets that retain their magnetism when removed from other magnets
Temporary Magnets
Temporary Magnets are magnets that loose their magnetism when removed from another magnet
Repulsion
An opposing force
Attraction
The force of which one object is attracted, connected or has interest to one another
Magnetic Fields
Magnetic fields are the areas where the magnetic force acts
Force
A force is a push or pull in a particular direction they are occurring around us all the time
• opening a door
• opening a jar
• opening and closing a pencil case
Domains
Mini magnets inside a magnet that make the magnet magnetised if the domains are lined up, and facing the same way. If domains are mixed up the magnet will not be magnetised
Electromagnet
An electromagnet is a non-magnetised piece of iron that has a coil of insulated wire around it.
Atoms
A very small particle that makes up all things
Nucleus
Roundish structure inside cells that acts as a control centre for the cell
Electrons
Very light, negatively charged particles inside an atom
Negative electric charge
The charge on an atom or object with more electrons than protons
Protons
Tiny, but heavy particle found in the nucleus of an atom
Positive electric charge
The charge on an object or atom with fewer electrons that’s protons
Neutrons
Tiny, but heavy particles found in the nucleus of an atom
Neutral
Having the same amount of protons and neutrons
Static Electricity
A build up of charge in one place
Insulators
Materials that do not allow electric charge to flow through them
Conductors
Materials that allow electric charge to flow through them
Lightning Rods
Conductive Metal rod, that is often tied to the top of tall buildings. Lightning rods help to keep buildings safe from lightning strikes.
Mass
A measure of the amount of material in an object of substance
