GRAVITY /MAGNETISM Flashcards
Do all objects naturally repel each other?
No - they attract
True or False
Objects fall at different speeds due to their surface area?
True
What’s the unit used to measure weight?
NEWTONS (N)
What’s the force that’s created by the flow of air?
Terminal velocity
Is gravity a non-contact force?
Yes
If your on the moon would your weight be different?
Yes
Is air resistance contact or a non-contact force?
Contact force
What force is a magnetic force?
Non-contact
True or false
As you get close to a magnet, the size of the force decreases?
False, it increases
What are the end of a magnet called? What are their names
Poles. North and South
What two poles like each other?
What two poles dislike each other?
N+S and S+N
S+S and N+N
What do magnets pull?
Iron, cobalt and nickel
True or false?
There’s a very weak magnetic force around the earth?
True
True or false?
When the compass points N its pointing towards the North Pole
True
A non-contact force acts through a region of space called a …?
Force field
What do magnetic field lines do?
Show the direction that a compass would point
Always run from the North to the South Pole
Do not cross
Represent a strong magnetic field when they are bunched closely together
Represent a week magnetic field when they are spaced further apart
What’s the definition of force field?
Region of space in which an object will experience a non-contact force
Where does gravity pull objects to?
Centre of the earth
True or false?
An object that is affected by gravity lies within a gravitational field area is called a force field?
True
Does the earth’s magnetic field stretch out to space?
Yes
