Units of Measurement
The following are SI units for what?
Meters
Centimeters
Kilometers
Distance or Length
What is the difference between speed and velocity?
Velocity has direction
What are the three ways an object can accelerate.
Speed up
Slow down
Change direction
You can tell an object has moved when it has had a change in this _________________
Position
This value is always on the horizontal, or x-axis, when graphing both speed and acceleration?
Time
When is the only time that distance and displacement are equal?
When traveling in a straight line in a single direction.
What is the SI unit for time?
Seconds
What is the formula for calculating speed and velocity? (use your triangles)
Distance/Time
What type of acceleration indicates a decrease in velocity?
Negative acceleration
The distance and direction of an object from its starting point is called what?
Displacement
In this type of graph, distance is on the vertical, or y-axis?
Speed or Velocity
What is measured as m/s/s or m/s2
Acceleration
What type of speed is indicated on a speedometer?
Instantaneous speed
What is the acceleration of an object with a constant
velocity?
Zero
The tendency of an object to resist a change in its motion is called what?
Inertia
In an acceleration graph, this value is on the y-axis or vertical axis?
Velocity
What can be measured as m/s or km/h?
Speed
Type of velocity when an object is NOT slowing down, speeding up, or changing direction.
Constant Velocity
What is the cause of acceleration? (think forces)
Unbalanced forces
Forces that are equal in size but opposite in direction causing net force to equal zero are called what?
Balanced Forces
What does a horizontal line on a speed graph mean?
No motion
What is the SI unit for mass OR inertia?
Kilogram
What is the velocity of a skier that skis downhill 30 m in 2 s.
15 m/s downhill
What is the acceleration of the space shuttle as it changes from 25000 m/s to 500 m/s in 50 seconds?
-490 m/s2
What is the other name for Newton’s First Law of Motion
The Law of Inertia
What is shown with a horizontal line on an
acceleration graph?
Constant Velocity