Speed and Velocity
What is the formula for speed?
Speed = Distance / Time
What is the slope on a position-time graph?
velocity
What is the formula for acceleration?
Acceleration = Final Velocity - Initial Velocity / change in time
What formula is m/s an example unit?
speed or average speed
What does the slope on a velocity time graph give us?
acceleration
How is speed different from velocity?
Velocity needs a direction
What does a flat line mean on a position time graph?
The object is not moving
What are three ways that the velocity can change so that there is a non-zero acceleration?
speeding up, slowing down, changing direction
What do the units km/hr measure?
speed or velocity
On a velocity time graph, what does a horizontal line indicate?
constant speed
What is the time it takes a cow to walk north 160 m at 8 m/s?
20 seconds
What does a steeper line indicate on a position time graph?
the object is moving at faster constant speed
Final Velocity = 50 m/s
Initial Velocity = 60 m/s
Time to change velocity = 5 seconds
What is the acceleration of this object?
-2 m/s squared
m/s^2 are units of this quantity
acceleration
A positive slope on a velocity time graph means _____.
Positive acceleration
A porcupine moved toward a pond at a speed of 5 m/s. It took him 8 seconds. What was the distance he traveled?
40 meters
What does a positive slope mean on a position time graph?
the object is moving forward
How would you describe negative acceleration?
moving in a negative direction or slowing down
5 mph north
velocity
The y-value on a velocity time graph is the _______,
velocity
What is the velocity of an object moving east for 6 seconds and had a displacement of 60 m?
10 m/s east
What does a negative slope mean on a position time graph?
the object is moving backwards
A car at rest speeds up to 40 m/s in 8 seconds. What is the acceleration?
5 m/s2
What formula would we use if we wanted to find out how an object's velocity changed within a certain period of time?
What is Acceleration
What does a negative slope on a velocity time graph usually represent?
slowing down