Velocity vs Speed
What's the difference between speed and velocity?
Velocity includes direction; speed does not
What does a horizontal line on a position-time graph represent?
The object is at rest
What does a curved line on a position-time graph indicate?
Acceleration
What does a positive slope on a velocity-time graph represent?
Positive acceleration
What does V = U + at represent?
The final velocity after time (t) with constant acceleration
Does velocity change when moving in a circle at constant speed?
Yes, because direction changes.
What does a straight sloped line on a position-time graph indicate?
Constant velocity
What does a steep slope on a position-time graph represent?
Higher velocity
What is the acceleration of an object moving at constant velocity?
Zero
What does (s) in the equations of motion?
Displacement
What's the velocity of an object moving 10m north in 2 seconds?
5 m/s north
What does the slope of velocity-time graph represent?
Acceleration
What does a horizontal line on a position-time graph mean?
The object is at rest
What does a negative slope on a velocity-time graph indicate?
Negative acceleration
What does (u) stand for in the equations of motion?
Initial velocity
True or False: Two cars at the same speed but opposite directions have the same velocity
False
On a velocity-time graph, what does a horizontal line at zero represent?
The object stationary
What does a downward sloping line on a position-time graph represent?
The object is moving backward (negative velocity)
Acceleration remains the same
What is the formula for final velocity if you know initial velocity, acceleration, and time?
V=U+at
An object moves 20m east in 4 sec, then 20m west in 4 sec. What's the average velocity?
0 m/s
How do you find displacement from a velocity-time graph?
By calculating the area under the curve
How do you calculate velocity from a position-time graph?
By finding the slope of the line
How can you find acceleration from a velocity-time graph?
By calculating the slope of the graph
How do you calculate the total distance traveled when acceleration is constant?
By using the average velocity and multiplying it by time