Definitions
Define Hypothesis
An educated guess
Speed and Velocity
Velocity also includes the direction
What are the steps of the scientific method?
Question, Hypothesis, Experiment, Theory
What is the change in Velocity called?
Acceleration
True or False: I can talk during the test as long as it's quiet and I'm finished with the test.
FALSE
Define Speed
How fast an object travels
Dependent and Independent Variable
The scientist determines the independent variable. the dependent variables depend on the independent variable
Will Mr. Chapman weigh more on Earth or on the Moon? Why or why not?
Mr. Chapman will weigh more on Earth because Earth has stronger gravity and weight is a measure of how hard gravity will pull on mass.
What is the measure of gravity's pull on an object's mass?
Weight
What is the highest speed ab object will reach while falling called?
Terminal Velocity
Define Velocity
How fast an object travels AND the direction in which it goes
Force and Net Force
Net Force is the combination of all the forces on an object
Is Mr. Chapman's mass different on the Moon?
Nope
What is the measure of the quantity of matter
According to which law is it that all objects produce gravity?
The law of Universal Gravitation
Define Force
A push or a pull
Balanced and Unbalanced Forces
Balanced forces cancel out. Unbalanced forces cause a change in an object's motion
Describe the forces acting on Mr. Chapman as he parachutes to the ground
The forces are balanced between wind resistance and the force of gravity
What is the distance between your starting an ending points called?
Displacement
Why is there no terminal velocity on the Moon?
There is no air to provide wind resistance
Define Mass
The measure of the amount of matter in an object
Mass and Weight
Weight is a measure of how hard the Earth's gravity pulls on an object's mass
If Mr. Chapman forgets his parachute when jumping out of an airplane, how long would it take him to fall before he reaches the speed of light?
He wouldn't
An object in motion will remain in motion and an object at rest will remain at rest unless acted on by an unbalanced force.
Newton's First Law
Name the three types of friction and ways in which you can increase and decrease friction.
Static Friction, Sliding Friction, Rolling Friction.
Decrease: roll, add lubricant, smooth
Increase: change the grip of the surface, apply more pressure