Standard Science Primary 6 Interactions

A spring stretches by 2 cm when a 50 g weight is hung on it. What is the total length of the spring if its original length is 10 cm and a 150 g weight is hung on it?

A 14 cm
B 18 cm
C 16 cm
D 12 cm
Show Worked Solution

Worked Solution

Step 1: Calculate extension per 50g (2 cm). Step [2-9]: 150g is 3 times 50g, so extension is 2 cm x 3 = 6 cm. Step [2-9]: Total length = original length + extension = 10 cm + 6 cm = 16 cm.

Correct answer: 16 cm

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