Distance & Displacement
What is the formula for displacement?
Displacement = final position - initial position
What is the formula for average speed?
speed = distance / time
What is the formula for acceleration?
Acceleration = change in velocity / change in time
What does the prefix "kilo" mean
1000
A car drives 120 km in 3 hours. What is its average speed?
40 km/h
If a runner moves 50 m east, then 20 m west, what is the total distance traveled?
70 m
What makes velocity different from speed?
velocity includes direction
If a bike speeds up from 0 to 10 m/s in 5 s, what is its acceleration?
2 m/s squared
What SI unit is used to measure distance?
Meter (m)
A student runs 100 m east and then 100 m west. What is the displacement?
0
If a runner finishes where he started, what is their displacement?
0 m
If a car travels 100 km in 2 hours, what is its average speed?
50 km/h
If an objects velocity doesn't change, what is its acceleration?
0
Convert 500 cm to meters
5 m
A train speeds up from 10 m/s to 20 m/s in 5 s. What is its accerleation?
4 m/s squared
Can displacement ever be greater than distance?
No
A car goes north at 20 m/s, then south at 20 m/s. What happens to its average velocity?
It could be zero, they cancel
True or False: Acceleration can be negative.
True (that's slowing down)
Convert 2 km to meters
2000 m
If a person walks 600 m in 10 minutes, what is their average speed in m/s
1 m/s
A student walks in a circle and ends up back at the start. What is their displacement?
0 m
True or False: A moving object can have constant speed but changing velocity.
True, if it changes direction (like going in a circle)
What are the SI units for acceleration?
m/s squared
What SI unit is used for time?
Seconds (s)
A ball rolls 20 m north in 4 s. What is its velocity?
5 m/s north