Physics Flashcards
What is a force
A force is an interaction between 2 objects. It is a push, pull or a twist.
What type of force is gravity
Gravity is a non contact force
What type of force is magnetism
Magnetism is a non contact force
What type of force is applied force
Applied force is a contact force
What type of force is tension
Tension is a contact force
What type of force is friction
Friction is a contact force
What are the 5 main forces
- Gravity
- Magnetism
- Applied force
- Tension
- Friction
Balanced force
When forces acting in opposite directions are the same size, they are said to be balanced.
Unbalanced force
When forces acting in opposite directions are not equal, they are said to be unbalanced.
What type of force is static electricity
Static electricity is a non contact force
What is a contact force
Contact forces are forces which act on objects through physical contact.
What is a non contact force
Non contact forces act on objects without physically touching the object.
Does a force have to be unbalanced for an object to move, and why?
A force does not have to be unbalanced for an object to move because if the object is already moving and it stays at the same speed (it doesn’t accelerate), then it is a balanced force.
What is a reaction force?
A reaction force is a reaction to another force that equals it in the opposite direction. E.g. If gravity is pulling an object down, the ground provides a reaction force that equals gravity by pushing the object up with the same amount of force. If two opposing forces are unbalanced, the stronger force will be the direction the object ACCELERATES (not moves!) in.
Independent variable
The variable you purposely change
