1. Velocity –Time Graphs

2. Velocity –Time Graphs

3. Information from Velocity Time Graphs
1.Slope=Acceleration(units are m/s2)
2. Find Acceleration= is the change in velocity. 2 things can create acceleration 1.change in direction and or 2. change in speed. It is the slope of V-T graph
Formula for acceleration =
vf – vi /tf – ti

4. 3. Velocity – Read it off the graph
4. Instantaneous speed-Read it off the graph
5. Displacement= Area under the line

5. Acceleration Word Problems
Key points to remember are the units!!!
m/s is velocity or speed
m/s2 is acceleration
m is displacement or distance(far)
Secs is the time(how long it took to get there)

6. A race car accelerates from rest to +7. 5m/s for 4. 5s
A race car accelerates from rest to +7.5m/s for 4.5s. What is the acceleration of the car?

7. A hockey player accelerates on ice at 10. 2m/s2 in 2. 53 s
A hockey player accelerates on ice at 10.2m/s2 in 2.53 s. If his initial velocity is 1.25m/s, what is his final velocity?