Unit 4 Review Flashcards
What is a force?
A force is a push or a pull
Sometimes, it is obvious that a force has been applied, while other forces are less noticeable.
What does a force cause?
A force causes objects to change their motion.
This can include changes in speed, direction, or shape.
What is net force?
Net Force is the sum of all forces acting on an object.
It determines the overall effect of all the forces applied.
How are forces measured?
Forces are measured in Newtons (N).
The Newton is the standard unit of force in the International System of Units (SI).
What are the three rules for adding forces?
- Add forces in the same direction.
- Subtract forces in opposite directions
- Forces not in the same direction or in opposite directions cannot be directly added together
This means that if two forces are acting towards the same point, their magnitudes can be summed.
What is the rule for subtracting forces in opposite directions?
Subtract forces in opposite directions.
This is how net force is calculated when forces act in opposite directions.
True or False: Forces not in the same direction or in opposite directions can be directly added together.
False.
Forces that are not aligned cannot be summed directly.
What type of quantities are forces?
Forces are vector quantities.
This means they have both magnitude and direction, similar to displacement.
What are free-body diagrams used for?
To show the relative magnitude and direction of all forces acting upon an object in a given situation.
In a free-body diagram, what does the size of the arrow represent?
The magnitude of the force.
In a free-body diagram, what does the direction of the arrow indicate?
The direction that the force is acting.
What is labeled on each force arrow in a free-body diagram?
The exact type of force.
Fill in the chart.
The symbols have been left to help you.
What is the symbol for Air Resistance Force?
Fair
What type of force is Applied Force represented by?
Fapp
