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



1. Which of these is a scalar quantity?
 A. displacement
 B. power
 C. velocity
 D. acceleration


2. Which of these is a vector quantity?
 A. pressure
 B. mass
 C. force
 D. time


3. A vector quantity has
 A. size only^{}
 B. size and direction^{}
 C. direction only^{}
 D. neither size nor direction^{}


4. A polar bear walks 8 km north searching for food, and then 5 kilometers south again. Which of these gives the total distance travelled and displacement of the bear at the end of the journey?

Distance (km) 
Displacement (km) 
A 
13 
13 
B 
8 
3 
C 
3 
13 
D 
13 
3 


5+6. The polar bear does a second journey the next day, this time walking 3 km north and then 4 km east. 

5.What is the total displacement of the bear from the start?
 A. 7 km
 B. 5 km
 C. 25 km
 D. 4 km


6. Which of the following arrows best describes the total displacement?


7+8. Two forces are acting on a point as shown in the diagram. 

7. Which of these arrows best represents the resultant force on the point?


8. The magnitude of the resultant force is
 A. 40 N
 B. √40 N
 C. 8 N
 D. √8 N


9&10. A cannonball is fired at a velocity v from a cannon, at an angle of 25^{0} to the horizontal. 

9. The vertical component of the velocity is given by


10. If the horizontal velocity is found to be 20 m s^{1}, then the value of v is equal to


