Physics Test Revision Flashcards
What is Inertia?
Inertia is the natural tendency of an object to maintain its velocity, meaning it resists any changes in speed or direction. Inertia is not a force.
What is velocity?
An object’s speed and direction.
Examples of Inertia.
An object at rest tends to stay at rest. A moving object tends to keep moving with the same speed in the same direction.
What is a force?
A push or pull.
What is net force?
The sum of the forces acting on a single object
How do you find net force?
Add any forces acting in the same direction and subtract any forces acting in opposite directions
What are the units of force and net force?
Newtons
What are balanced forces?
When two forces have the same strength but opposite directions, meaning net force is 0.
What are an unbalanced forces?
When are different strengths or do not act in opposite directions, they cannot cancel each other out, therefore the net force is not 0.
What happens to an object with 0 net force?
It either remains at rest or keeps moving with the same velocity, it has 0 acceleration.
What happens to an object with a net force acting on it?
It accelerates in the direction of the net force.
