Displacement & Distance
An object travels 4m[N] then rests before moving 3m[S]. What is the total DISTANCE the object moves?
7m
What is the difference between speed and velocity?
Velocity is a vector and has a direction whereas speed does not have a direction
(Graph 1) Tell a story for this graph. Be specific!
Answers Will Vary
(Graph 3). When does the object have an instantaneous velocity of 0m/s? Hint: There are two places!
0s, 30s
Define acceleration
Acceleration is the rate of change of the velocity of an object
An object travels 4m[N] then rests before moving 3m[S]. What is the total DISPLACEMENT the object undergoes?
1m[N]
A cops rader gun is an example of a device that can measure an objects _______________ speed.
Instantaneous
(Graph 2): When is the object at rest?
10-20s
(Graph 3) When is the object moving at constant velocity?
10-20s
What is the acceleration due to gravity on Earth?
9.8m/s^2
An arrow above a variable tells us that the quantity of the motion is a....
vector
A car stars from rest and travels 50km over 1 hour. What is the car's speed?
50km/h
(Graph 2) When is the object moving towards "home"?
20-30s
(Graph 3) When is the object speeding up?
0-10s 30-40s
(Graph 4) What is the acceleration of the object from 0-20s?
0.2m/s^2
An odometer in your car measures what quanity of motion?
Distance
A car travels 670m[N] over 35 seconds. What is its velocity?
19m/s[N]
(Graph 2) What is the velocity of the object between 20-30s? Velocity must have a direction!
-1m/s[N]
OR
1m/s[S]
(Graph 4). What is the displacement of the object from 20-40s?
40m[N]
A car starts from rest and reaches a speed of 10m/s over 5 seconds. What is the car's acceleration?
2m/s^2
You have decided to take a cruiser around the world. You start in Halifax harbour and end your journey at halifax harbour. What is your total displacement?
0m
A car travels 50km[N] then quickly turns around and travels 30km[S]. The whole journey takes and hour. What is the average VELOCITY of the object over the WHOLE journey?
20km/h[N]
It has moved faster
(Graph 4) What is the total displacement of the object over the whole journey?
40m[N]
A car is travelling at 50km/h. The driver uses the breaks and the car comes to a rest over 3.2s. What is the acceleration of the car?
-4.3m/s^2