Physics Secondary Schools Worksheet Page 6
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10SECTION B: Answer ALL questions. This section has a total of 45 marks.
6. David measures the extension of a spring when weights are added.
extended
spring
spring
weights
David’s results are as follows:
Weight N
0
1
2
3
4
5
6
7
Length mm
40
48
60
64
72
80
88
96
Extension mm
0
8
(a)
What is the length of the unstretched spring ?
___________________________________________________________________________
(1)
(b)
David left out some results. Complete the table by working out the missing values.
(3)
(c)
Plot a graph of Extension on the y–axis against Weight on the x-axis . Draw the best
straight line for your graph.
(5)
One of David’s results is incorrect. Which extension is incorrect ?
(d)
___________________________________________________________________________
(2)
(e)
Use the graph to find the weight which causes an extension of 36 mm.
___________________________________________________________________________
(1)
(f) David adds more weights to the spring. He notices that his spring loses its shape.
Complete: The spring has exceeded the ______________ limit and no longer obeys
______________ Law.
(2)
(g) On the diagram shown, mark with a
cross X the point where the spring loses
its shape.
(1)
Physics – Secondary Schools – Track 2 – Form 3 – 2013
Page 6 of 10
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