Speed
A runner covers 100 m in 20 s. What is their speed?
50 m/s
Maria walks 200 m to the park, then 200 m home. What is her displacement?
0, no displacement
A distance–time graph shows a straight line sloping upward. Is the object moving at a constant speed, accelerating, or stopped?
Constant speed
Which has direction: speed or velocity?
Velocity = Speed + Direction
A car drives 300 km in 5 hours. What is its speed?
70 km/h
A student walks 10 m forward and then 10 m back. Why is their distance different from their displacement?
Distance is the total length of a path traveled.
Displacement is a straight line distance and direction from start to end
On a position–time graph, a flat (horizontal) line means what?
The object is at rest.
Which unit is correct for speed: m/s, kg, or liters?
m/s
A cyclist rides 1,200 m in 200 s. What is their speed in m/s?
6 m/s
Jacob walks 80 m east, then 30 m west. What is his displacement?
50 m east
Two students’ position–time graphs are shown. Student A’s line is steeper than Student B’s. Who is moving faster?
Student A
What is the formula for speed?
Speed = Distance/Time
A cheetah runs 500 m in 20 seconds. What is its speed?
25 m/s
A runner goes 400 m around a track and ends at the start. What is their displacement?
0 displacement, start and end points are the same.
A speed–time graph shows a line sloping downward. What does that mean about the object’s motion?
The object is returning to its starting point
Can an object have a speed of 0 but still have a displacement that is not 0? Explain.
yes, an object can have speed = 0 while still having a nonzero displacement.
A plane flies 720 km in 8 hours. What is its speed in km/h?
90 km/h
A student walks 10 m north, then 30m south. What is their distance? What is their displacement?
Distance = 40m
Displacement = 20m south
A car drives 3 km east, then 4 km west. What is the total distance? What is the displacement?
Distance = 7 km Displacement = 1 km west
On a position–time graph, an object moves away from the start for 5 seconds, stops for 5 seconds, then returns back to the start in the next 5 seconds. Sketch what this graph would look like.
NA