In a Hooke’s law experiment, the following weights were attached to a spring, resulting in the following elongations:
Weight (N) Elongation (cm)
50 ........... 2.0
75 ........... 3.3
105 ........... 4.2
125 ........... 5.0
150 ........... 6.0
175 ........... 7.4
225 ........... 9.5
275 ........... 11.1
(a) Plot the graph of weight versus elongation and draw the best straight line through the data.
(b) From the graph, what weight corresponds to an elongation of 7.5 cm?
(c) From the graph, what elongation corresponds to a weight of 220 N?
(d) From the graph, determine the spring constant.