Intro to Physics
What is the name of the vertical axis on a graph?
Identify the following as speed or velocity:
88 km/h
9 m/s to the west
18 m/s down
10 m/s
1. speed
2. velocity
3. velocity
4. speed
On what objects does the force of gravity act?
EVERYTHING
How much does the work change by slowing walking up a flight of stairs vs. running up the stairs
Nothing... work stays the same
What does a wave carry?
Energy
What is the name of the horizontal axis of a graph?
The X Axis
Identify the straight line accelerations below as either speeding up or slowing down:
5.7 m/s2
-29.8 m/s2
-2.43 m/s2
9.8 m/s2
1. speeding up
2. slowing down
3. slowing down
4. speeding up
Name that Law:
For every action force, there is an equal and opposite reaction force.
Newton's Third Law
Give an example of negative work
Friction
brakes on a bike
A wave that requires a medium through which to travel.
Mechanical Waves
Which type of graph should be used to plot distance vs. time?
A Line graph
What is the name of acceleration in a circle?
Centripetal Acceleration
Name that Law:
An object at rest remains at rest and an object in motion maintains its motion unless it experiences a net force.
Newton's First Law
Name the two types of potential energy.
Elastic potential energy
gravitational potential energy
A wave that consists of oscillating electric and magnetic fields, which radiate outward at the speed of light.
Electromagnetic
What is the significance of an SI Base Unit?
Accuracy world wide
Define Free Fall
When an object is only under the influence of gravity and nothing else.
1. What happens to your mass when you go to a different planet?
2. What happens to your weight when you go to a different planet?
1. Mass stays the same
2. Weight changes depending on the amount of gravity present.
The higher the KE of the atoms and molecules in an object is, the _______ the object’s _______ is.
the higher the object's temperature is
List the two ways to calculate wave speed.
1. Wave Speed = wavelength / period
2. Wave Speed = frequency x wavelength
What does the prefix kilo mean?
Give one example using the prefix.
one thousand
Example: kilogram (kg), kilometer (km)
What is the direction that a projectile travels?
Add a drawing to help
A curved path. Both horizontal & vertical
Name that Law:
The unbalanced force acting on an object equals the object’s mass times its acceleration
Newton's Second Law
What are the three types of systems?
Open System, Closed System, Isolated System
An observed change in the frequency of a wave when the source or observer is moving.
The Doppler Effect