Inertia
What is inertia?
The tendency of an object to resist changes in its state of motion.
What unit is mass measured in?
Kilograms (kg)
What is acceleration?
The rate of change of velocity of an object.
What is friction?
The force that opposes the motion of an object.
What is an independent variable?
The variable that is changed or controlled in an experiment.
Which law of motion describes inertia?
Newtons 1st Law of Motion
How does mass affect the motion of an object?
More mass requires more force to change its motion
What formula is used to calculate acceleration?
a=F/m (acceleration equals force divided by mass).
How does surface texture affect friction?
Rough surfaces produce more friction than smooth surfaces.
What is a dependent variable?
The variable that is measured or observed in response to changes in the independent variable.
Give an example of inertia in everyday life
A passenger lurching forward in a car when it suddenly stops
How is mass different from weight?
Mass is the amount of matter in an object; weight is the force of gravity on that mass.
What does a positive acceleration indicate?
An increase in velocity.
What factors affect the amount of friction between two surfaces?
The texture of the surfaces and the force pressing them together.
What is the purpose of a control variable?
To keep other factors constant so that the effect of the independent variable can be isolated.
How does mass affect inertia?
greater mass = greater inertia
Objects with more mass have more _______
Inertia
How do we measure acceleration?
m/s2
More friction ______________ motion
reduces
How do you graph dependent vs. independent variables?
The independent variable is plotted on the x-axis, and the dependent variable is plotted on the y-axis.
What is the relationship between inertia and an object's motion?
Inertia keeps an object at rest or in uniform motion unless acted upon by an external force.
What happens to the mass of an object if it is taken to the Moon?
The mass remains the same; only the weight changes due to gravity.
What is the relationship between acceleration and net force?
Greater net force results in greater acceleration.
How can friction be reduced in a system?
smoothing the surface
Explain how to interpret the slope of a line on a graph.
The slope indicates the relationship between the variables; a steeper slope indicates a stronger relationship.