FORM 2 PHYSICS

ONLINE TEST SERIES

HOOKES LAW

  1. The diagram shows how the length of a spring changes when a load of 10 N is hung on it
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  3. The 10 N load is replaced by a 20 N load. What is the new length of the spring? 
 
 
 
 
  1. A spring balance is calibrated to give readings in newtons. The graph shows how the extension of the spring varies with the load.

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A load causes the spring of the balance to extend by 3 cm.

What is the balance reading?

 
 
 
 
  1. A student adds weights to an elastic cord. He measures the length of the cord for each weight. He then plots a graph from the results, as shown below..

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Which length has he plotted on the vertical axis?

 

 
 
 
 

4. An extension-load graph for a wire is shown

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What is the load at the limit of proportionality for the wire?

 
 
 
 
  1. A 100 g mass is suspended from a spring next to a vertical metre rule. The top of the spring is level with the 0.0 cm mark. The bottom of the spring is level with the 27.2 cm mark.

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The 100 g mass is replaced with a 600 g mass. The length of the spring is now 89.7 cm. The spring has not reached the limit of proportionality.The 600 g mass is replaced with a 200 g mass. What is the length of the spring?

 
 
 
 
6. Which formula correctly states the relationship between force and extension?
 
 
 
 
7. If a material has a spring constant of 10N/m and is extended by 1m, what force must have been applied to the object?
 
 
 
 
8. What is the size of the extension of an object which has a spring constant of 30N/m when a force of 15N is applied?
 
 
 
 
9. A slinky is stretched from being a length of 15cm to a length of 2m. One end of the slinky is affixed to a point whilst a child pulls on the other end with a force of 10N. What is the spring constant of the slinky?
 
 
 
 
10. An spring is stretched to a point where, when released it does not return to its original length. What is this point called?
 
 
 
 

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