Standard Science Primary 6 Interactions

A spring has an original length of 10 cm. When a 50 g weight is hung on it, the length becomes 12 cm. What will the total length be if a 100 g weight is hung on it?

A 14 cm
B 15 cm
C 24 cm
D 20 cm
Show Worked Solution

Worked Solution

Step 1: Calculate extension for 50g (12cm - 10cm = 2cm). Step 2: Extension for 100g (double the weight) = 2cm x 2 = 4cm. Step 3: Total length = Original length + New extension (10cm + 4cm = 14cm).

Correct answer: 14 cm

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