1. Day 7
UNIT 1 Motion Graphs x t
Lyzinski Physics

2. Day #7 * a-t graphs (HONORS ONLY) * “THE MAP”

3. x-t ‘s x t UNIFORM Velocity Speed increases as slope increases x t
Object at REST x t
Moving forward or backward x t
x-t ‘s
Object Positively Accelerating x t x t
Changing Direction x t
Object Speeding up
Object Negatively Accelerating

4. v-t ‘s UNIFORM Positive (+) Acceleration
Acceleration increases as slope increases v t v t
Changing Direction
v-t ‘s
UNIFORM Velocity
(no acceleration) v t v t
Object at REST
UNIFORM Negative (-) Acceleration

5. a-t ‘s HONORS ONLY!!! UNIFORM Acceleration a a t t UNIFORM Velocity OR
An Object at REST

6. Slope of the tangent to the curve at a point
Graph Re-Cap
Type of graph
Slope of a line segment
Slope of the tangent to the curve at a point
x-t
v-t
a-t
Average velocity Instantaneous Velocity
Average acceleration Instantaneous acceleration
JERK!!!!!!!!!!! (no jerks on test )
x-t
Tells you nothing
Area under curve
v-t
Displacement (Dx)
a-t
Change in velocity (Dv)

7. a-t graphs Slopes???? No jerks on test  a (m/s2) t (sec) t0 t1
The area under the curve between any two times is the CHANGE in VELOCITY during that time period.
No jerks on test 

8. THE MAP!!!! x-t v-t a-t AREA SLOPE “3 towns, 4 roads” Dx
Dv (honors only)
“3 towns, 4 roads”

9. 5 Open to in your GREEN packet a = 6 m/s21) 2)
a = 6 m/s2
Dv = area = 4 (6) + (2.5 * -9) = 1.5 m/s

10. 3) 4)
Dv = area = 2.5 (6) = 15 m/s  Dv = v2 – v1  v1 = (-5) – 15 = -20 m/s
Either at rest or at a constant velocity, const + accel, const – accel, non-constant – accel, non-constant + accel

11. Check out your Unit 1 Schedule … Day #7
HOMEWORK
Check out your Unit 1 Schedule … Day #7
1st Lab tomorrow.
Lab contract MUST be signed to do the lab. Where closed toed shoes tomorrow.
(no sandals!)