Sectieoverzicht

    • Leerlingen moeten
      Als voltooid aanduiden

      Activity 1


      What you will need:

      Spring

      Ruler

      Mass hanger

      Slotted weights

      Retort stand

      A pointer

      What you will do:

      1. Set up your apparatus as shown in the diagram below. 

      Hookes law

      2.  Copy the following table into your notebook. 

      Hookes law table 1

      3. Measure the length of the spring with no mass added. Note the length in the table.  

      4. Add 1 slotted weight to the spring and measure the length of the spring.  Record the new length in the table.

      5. Add another slotted weight.  Measure and record the length of the spring.  

      6. Repeat step 5 until you have added 5 slotted weights. 

      7. Complete the table by calculating the extension of the spring.  Remember to subtract the original length of the spring from each of your length measurements, so that you are recording the extension of the spring, and not its total length. 

      Plot this data on a graph, using the mass of the slotted weights on the x axis and the length of the spring on the y axis.   

      Expected results:

      Hookes law results table

      Graph showing hookes law results

      What do you notice about the relationship between the mass added and the length of the spring?

      Conclusion:

      As slotted weights were added to the spring, the length of the spring increased.  This is because the mass caused extension in the spring.  The relationship between the mass added and the length of the spring is directly proportional.  This means that for every weight added, the extension of the spring will be the same.  

      Extension happens when an object increases in length, and compression happens when it decreases in length.  

      Tension and extension

      Tension is a type of pulling force and the force transmitted in the spring when it is stretched.  As mass is added to the spring, and therefore putting the spring under tension, the length of the spring is extended. 



    • Leerlingen moeten
      Als voltooid aanduiden

      Activity 2

      What you will do:

      1. Visit : Phet Lab Hookes Law

      2. Press on the stretch tab.
      3. Click on the boxes on the right-hand side to show unstretched length, resting position and movable lines. 
      4. Place the ruler in line with the unstretched line.

      Phet lab for Hookes law

      5. Adjust the spring strength to small on the left hand-side and strong on the right-hand side.  Place the100g weight on each spring.    Change the weights to 250g. 

      What do you notice about the length of the springs?

      6.  Adjust the sizes of both springs to make them the same strength.   Place a 50g weight on the spring on the left, and a 100g weight on the spring on the right. 

      What do you notice about the length of the springs?

      When the strenght of the spring is changed, the smaller strengthened spring will have a larger extension because of there is increased tension because of the size of the spring and the mass of the weight.  The stronger spring will have a smaller extension because there is less tension on the spring.  

      When the strenght of the spring is the same, the spring with the larger mass will have a greater extension because of the increased tension.  

    • Tension and extension Test
      Leerlingen moeten
      Als voltooid aanduiden