2. #13 Speed and Momentum

3. Speed Depends on Distance and Time
speed – the rate at which an object moves
speed depends on the distance traveled and the time it takes to get there.
Average speed = total distance
total time

4. Constant Speed
Speed that does not change

5. The speed of a bicycle is the distance it travels divided by the time it takes.5

6. Velocity Speed with direction
A vector quantity [magnitude & direction]

7. (Its speed and direction remain the same.)
A plane with a constant velocity of 600 km/h west moves in a straight line.
(Its speed and direction
remain the same.)
A car going around a bend
at a constant 30 mph
has a constant speed,
but its velocity is not constant.
(Note the change in direction.) 7

8. V = D T
D = V • T
T = D V D V T

9. V = speed in the following equations

10. stop
stop

11. Speed Distance Average speed Constant speed Velocity Constant velocity
Word bank:
Speed
Distance
Average speed
Constant speed
Velocity
Constant velocity
Acceleration
Momentum