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Multiple Choice: Forces, Dynamics and Mechanics

Q1. What is the gravitational field strength at the Earth's surface?

A 10N/kg  
B 16N/kg  
C 50N/kg  
D 230N/kg  

 

Q2. Cog X has 16 teeth and cog Y has 8 teeth.

Cog X is turned around two times. How many times does cog Y turn around?

A 1  
B 2  
C 4  
D 8  

 

Q3. What is the smallest number of forces needed to bend an object?

A 1  
B 2  
C 3  
D 4  

 

Q4. The diagram shows the relationship between force and extension for a spring.

Which letter on the graph shows the elastic limit of the spring being stretched?

A Position A  
B Position B  
C Position C  
D Position D  

 

Q5. An object travelled 800m in 40 seconds.

What is the speed of the object?

A 0.05 m/s  
B 20 m/s  
C 840 m/s  
D 32,000 m/s  

 

Q6. An object moved 20cm with a force of 20N.

Calculate the work done in moving the object.

A 0.4 J  
B 4.0 J  
C 40 J  
D 400 J  

 

Q7. In which of the following situations does the force cause a rotation?

A Bouncing on a trampoline  
B Hitting a nail with a hammer  
C Pushing a friend on a swing  
D Sitting on a chair  

 

Q8. Which of the following is a scalar quantity?

A Acceleration  
B Displacement  
C Force  
D Speed  

 

Q9. Which distances are the same?

A 1 × 10–3m and 1 µm  
B 1 × 10–6m and 1 mm  
C 1 × 10–9m and 1 nm  
D 1 × 10–12m and 1 Gm  

 

Q10. A student puts different weights on four balances.

Which balance will give a clockwise moment?

A    
B    
C    
D