Physics Topics

1
Physics Topics

• How Are Speed and Velocity Related?

2
Speed and Velocity
distance

total
displacement

total


velocity

Average
speed

Average
time
time
Is it possible to move with constant speed but
not constant velocity?
Yes. (Cruising at 55 mph around a corner ?
changing direction changing velocity)
Time 1 min 18 sec
500 m
Is it possible to move with constant velocity but
not constant speed?
m
500


m
4
.
6
speed

average
s
s
78
m
0
No. (A change in speed would cause a change in
velocity.)


m
0
velocity
average
s
s
78
8
3
Acceleration

• Positive acceleration means increasing velocity
• Negative acceleration means decreasing velocity

4
Five Important Equations
Variable Thats Missing
1
2
3
4
5
5
Derivation of Equations 3 4
6
Derivation of Equation 5
7
Graphs
123546987
8
Graphs
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9
Graphs
123654897
10
Graphs
123654789
11
Projectile Motion