Definitions
Define motion
change of position or orientation of an object
The displacement of someone who runs around a 400m track
0 m
The standard unit for speed is
meters per second
m/s
Is acceleration a scalar or vector quantity?
vector (needs direction)
What goes on the x and y axis of a distance vs time graph?
x = time
y = distance
Define scalar
a quantity described by magnitude only (not direction(
If you walk 3 meters east and then 4 meters west, your displacement is…
1 m West
Define average speed
The total distance over the total time taken
Acceleration due to gravity
9.8 m/s2
A vector includes
magnitude AND direction
Define Distance
The total ground covered by a moving object is called
An object moves 5 meters east, then 3 meters west. Calculate the distance traveled and the displacement.
Distance = 8 m
Displacement = 2 m east
A car travels 150 kilometers in 3 hours. What is its average speed?
50 km/hr
Standard unit for acceleration
m/s2
Name 2 vector quantities
displacement, velocity, acceleration
Define vector
A quantity described by magnitude and direction
A car drives 12 km east and then 5 km west. Calculate the total distance and the displacement.
Distance = 17 km
Displacement = 7 km east
slope of the line
A train slows down from 50 m/s to 10 m/s over 20 seconds. What is its acceleration?
- 2 m/s2
What would a distance vs time graph look like with positive acceleration?
curve upwards
Define displacement
an object's overall change in position
“straight line” from starting point to end point
A person jogs 3 km west, 4 km north, and then 3 km east. What is the distance and the displacement?
Distance = 10 km
Displacement = 4 km north
A car travels 100 kilometers in the first hour, 50 kilometers in the second hour, and 30 kilometers in the third hour. What is the average distance the car traveled per hour?
60 km/hr
A cyclist increases speed from 4 m/s to 12 m/s in 4 seconds. What is the cyclist’s acceleration?
2 m/s2
A linear distance vs time graph indicates
no acceleration