10 minutes maximum! (can you do it in 5?)

Q 13:
Here are 4 distancetime graphs showing the movement of some atheletes:
Which of these shows....... 

1. .....an athelete moving away at constant speed? 

2. .....a stationary athelete?


3. .....an athelete moving back to the start at constant speed? 

4. The speed or velocity of any object can be measured in
 A. m/s^{2}
 B. N
 C. m/s
 D. m


Q57:
Here are some more graphs, showing velocitytime.
Which of these shows....... 

5. .....a constant velocity? 

6. .....a uniform deceleration? 

7. .....a falling tennis ball reaching terminal velocity? 





8. Velocitytime graphs can be used to calculate the acceleration and the distance travelled. Which row in the table below shows how is this done?

To Find The Distance: 
To Find The Acceleration: 
A 
Area under the line 
Length of line 
B 
Length of line 
Gradient of line 
C 
Gradient of line 
Length of line 
D 
Area under the line 
Gradient of line 


This graph shows a cyclist's velocity during the first 20 seconds of a bike race:

9. What was the acceleration of the cyclist?
 A. 0.6 m/s^{2}
 B. 1.6 m/s^{2}
 C. 120 m/s^{2}
 D. 240 m/s^{2}


10. How far did the cyclist travel in the first 20s?
 A. 0.6 m
 B. 1.6 m
 C. 120 m
 D. 240 m


