Describe motion
What is distance?
How far an object travels
What is the difference between speed and velocity?
Velocity includes direction; speed does not.
A resistance force
Describe the object's speed when the line is straight and slanted.
Constant
What is the formula for speed?
Speed = distance / time
What is speed?
How far an object travels in a certain amount of time
When does acceleration occur?
When an object speeds up, slows down, or changes direction
What happens when forces are balanced?
The object stays at rest or moves at a constant speed
Describe the object's motion when the line is flat.
At rest
A car travels 50 meters in 10 seconds. What is its speed?
5 m/s
What is displacement?
How far an object is from the start
A car moves at a steady 30 m/s north for 10 seconds. Is it accelerating?
No, because speed and direction stay constant.
What happens when forces are unbalanced?
The object accelerates
Describe the object's speed when the line becomes steeper over time.
Increasing (accelerating)
A cyclist rides 120 meters in 20 seconds. What is her speed?
6 m/s
A car drives 4 km east, then 2 km west. What are its distance and displacement?
Distance = 6 km
Displacement = 2 km east
A runner slows down before crossing the finish line. Is this acceleration?
Yes, because the runner slows down.
What is Newton's 1st Law?
An object at rest or in motion remains so until acted on by an unbalanced force
Is the object moving away or toward the origin when the line goes down?
Toward
Two runners travel the same distance. Runner A takes 10 s while Runner B takes 8 s. Who is faster?
Runner B
A student walks 3 km north, then 3 km south, and stops. What is their distance and displacement?
Distance = 6 km
Displacement = 0 km
Two objects move at the same speed, but one goes north and the other goes south. Do they have the same velocity?
No, because they move in opposite directions.
A ball rolls across the floor and slows to a stop. What unbalanced force caused it to stop?
Friction
Line A is steeper than Line B. Which object moves faster?
Line A
A train travels 400 km in 3 hours, rests for 1 hour, then travels 200 km in 2 hours. What is its average speed for the entire trip?
100 km/hr