Web Wise Speed-Time Graphs
Web Wise Speed-Time Graphs
Web Wise Speed-Time Graphs
http://www.bbc.co.uk/education/guides/z3h9q6f/revision/1
Click on Speed-Time Graphs.
speedtime
bus
graph
Look at each of the lettered sections OA, AB, BC, CD, DE and EF on the
speed-time graph.
(a) Choose the correct word from the table below to describe the motion
taking place in each section.
acceleration
steady speed
stationary
(i) OA _______________
(iv) CD ______________
(b) At what time during the journey did the bus reach its greatest speed?
________________
(c) How long was the bus stopped for during its journey? ______________
(d) During which section of the journey did the bus have the greatest
acceleration? _____________________
(e) Calculate the acceleration of the bus during section DE. Use a formula,
substitute in the numbers, and calculate to find your answer.
It is helpful to break the area under the speed-time graph into triangular
and rectangles when you are calculating the distance traveled.
speed/time
graphs
Graph A
Graph B
Graph C
2. Try answering this question to see if you can work out the distance
traveled from a speed-time graph. This is a Credit Level task. Once you have
tried it, scroll down to the answer to see if you did the calculation correctly.
bus graph
(a) What is the distance traveled by the bus during its 25 s journey?
Area under OA = ______________
Area under AB = ______________
Area under BC = ______________
Area under CD = ______________
Area under DE = ______________
Area under EF = ______________
TOTAL AREA = ______________
Total Distance Traveled in 25 s. _________
(b) What is the average speed of the bus during its 25 s journey? (formula,
substitute, solve)
Speed-time Graphs
You may wish to print a hard copy for your reference.
1.
The speed-time graph shows the motion of a cyclist on a straight track.
m/s
(ii). After what time does the cyclist start to slow down?
m/s2
m/s2
2.
The speed- time graph shows the motion of a car on a straight section of road.
(i). Which line on the graph represents the car when it is stopped?
(ii). What is the highest speed reached by the car?
m/s
(iii). Which line on the graph shows the car's speed decreasing with time?
(iv). Calculate the acceleration represented by line R
m/s2
(vi). Calculate the average speed of the car during the first 16 s of its motion. (Credit)
m/s
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