Standard Science Primary 6 Interactions

The graph shows the extension of a spring when different weights are added. What is the original length of the spring if its total length with a 20N weight is 15 cm and its extension for 20N is 5 cm?

A 15 cm
B 10 cm
C 5 cm
D 20 cm
Show Worked Solution

Worked Solution

Step 1: Total length = Original length + Extension. Step [2-9]: 15 cm = Original length + 5 cm. Step [2-9]: Original length = 15 cm - 5 cm = 10 cm.

Correct answer: 10 cm

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