Speed Math
A car travels 100m in 10s. What is its speed? (Must include correct units)
10 m/s
A straight horizontal line on a distance time graph shows......
No motion. (not moving) 0
What is velocity?
Speed with a Direction
A runner travels 100 m in 20 s, then rests 10 s, then runs 100 m in 20s.
Average speed?
👉 Total distance = 200 m
👉 Total time = 50 s
👉 Answer: 4 m/s
A cyclist travels 2km in 10 min. What is the speed in km/min.?
0.2 km/min.
If a graph line curves upward, what is happening?
Acceleration
Can an object have acceleration if the speed stays the same? Explain?
Yes acceleration is speeding up, slowing down or changing direction.
A car travels 60 m in 5 s. Then 60 m in 15 s.
What is the average speed?
6 m/s
Two students travel the same distance. One student takes twice as long.
Who has the greater speed? Explain
The student with the less time because speed depends on distance and time.
Draw a distance time graph with horizontal flat line followed by a steep line.
What is happening on the graph?
The object was stopped (not moving) then speed up or accelerated.
What is acceleration?(hint: includes 3 things)
Speeding up
Slowing down
Changing direction
A car travels 150 m in 10 s, then 50 m in 10 s.
👉 Calculate average speed AND describe motion.
Answer:
Speed = 10 m/s