Forces Flashcards
Define contact force
A force that acts when an object is in contact with a surface, air or water.
Describe what a force is.
A push and a pull.
What do you use to measure force in?
Newtons
Describe what a force field is
An invisible barrier of force.
What does extension mean?
The amount if which an object gets longer when a force is applied.
List at least 5 common forces:
Push Pull Drag Gravity Elastic
What is Hooke’s Law?
If you double the force of an object, the extension will double.
Define mass
The measure of the number of atoms in an object.
Define weight
A force exerted on a body by gravity.
What do you use to measure force?
A force metre.
What is the reaction force?
Force acting in the opposite direction.
What is Friction and what can it do when
it occurs?
Friction is when two objects slide or rub against each other. It can cause heat.
Give an example of when friction is
useful:
Slowing things down.
Give an example of when friction is not
useful:
Ice skating
As you get further away from a magnet, what happens to
the field strength?
The force decreases.
