Scientific Method and Graphing
What is the difference between an independent and dependent variable?
Independent Variable = causes the dependent variable to change
Dependent Variable = changes according to the independent variable
What does the length of each vector in a free body diagram represent?
The magnitude of each force.
What is the difference between weight and mass? What are each of their units?
Weight is the amount of force (gravity) working on an object, while mass is the amount of matter in an object.
Units: weight - N (Newtons)
mass - Kg (Kilograms)
What does it mean for the object's movement when the forces are all balanced?
There is no movement in the object.
What is kinetic and potential energy?
Kinetic energy is cause by motion, and potential energy is caused by position.
The amount of profit Mr. Robinson's speaker company produces increases by $5 every 10 minutes. When graphing this scenario, which factor goes into which axis?
y-axis: profit
What does the North, East, South, and West vectors represent?
North: Normal Force
East: Applied Force
South: Gravity
West: Friction Force
What is the difference between a contact force and non-contact force?
Contact forces require contact between objects for force to occur. Meanwhile, non-contact forces work even apart from quite a distance.
When is momentum conserved?
In a closed system. Without any external force.
What is gravitational potential energy?
Energy stored by the height of an object.
The object is moving fast.
List 2 examples of both vector and scalar quantities.
Vector:
1. Displacement
2. Velocity
Scalar:
1. Distance
2. Speed
What is μ?
μ represents the coefficient of friction in physics.
What is momentum?
Momentum is mass*velocity. It shows us how hard it is to stop an object from moving.
What is power and how does it relate to work?
Power represents how fast work is being done in seconds.
What is the difference of pseudoscience from science?
Pseudoscience has no evidence, experiment, or explanation.
Why are free-body diagrams important?
It helps us predict motion and determine net force.
What is the difference between kinetic friction and static friction?
Kinetic friction: the friction of an object or surface that is continuously opposing the force applied to the object during relative motion.
Static friction: the friction an object exerting a force needs to overcome in order to move an object.
What happens to the object when the forces are unbalanced?
The object goes through motion and accelerates. (doesn't matter which direction)
What does conservation of energy mean?
It means that energy cannot be destroyed, or created, only transferred or changed.