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Units
Acceleration
Positive or Negative?
Velocity-Time Graphs
Problems
100

meters

SI unit for distance/displacement


100
Acceleration is a change in this over time.
What is velocity
100
Acceleration is this if the object is moving at a constant speed.
What is zero.
100
This is on the x-axis.
What is time
100
Refer to the problem on the board. Identify what the problem is asking you to find.
What is acceleration
200

seconds

SI unit of time

200
Type of acceleration in a circle.
What is centripetal acceleration
200
Acceleration is _____________ when speeding up in the positive direction.
What is positive
200
This is on the y-axis.
What is velocity
200
Refer to the problem on the board. What is the time?
What is 3 minutes
300

m/s

SI unit for speed/velocity


300
Thing that changes if an object is undergoing centripetal acceleration.
What is direction
300
Acceleration is _______________ when speeding up in the negative direction.
What is negative
300
This determines acceleration
What is slope
300
Refer to the problem on the board. What is the initial velocity?
What is 9.8 m/s
400

m/s2

SI unit for acceleration

400
One or both of these two things needs to change in order for an object to accelerate.
What are speed and direction
400

Acceleration is ____________________ when slowing down in the positive direction

What is negative

400
A positive slope means that acceleration must be _______________.
What is positive
400
Refer to the problem on the board. What is the final velocity?
What is 10.5 m/s
500

Acceleration has this relationship to velocity

It is the change in velocity per unit time =

(Delta v)/(Delta t)

500
Equation for acceleration
What is final velocity-initial velocity over time
500
Acceleration is ___________________ when slowing down in the negative direction.
What is positive.
500
A slope of zero (horizontal line) means that acceleration must be _______________.
What is zero
500
Refer to the problem on the board. What equation would you use to solve?
What is acceleration = final velocity-initial velocity over time.