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The amount of extension in a spring is proportional to the weight hung on it. If the weight of 5 kgs produces an extension of 0.4 cm, what weight would produce an extension of 5 cm?
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- 6.25 kgs.
- 62.5 kgs.
- 4 kgs.
- 40 kgs
- 6.25 kgs.
Correct Option: B
According to the question,
The weight of 5 kgs produces an extension = 0.4 cm
∵ 0.4 cm. ≡ 5 kg.
| ∴ 1 cm. ≡ | kg | |
| 0.4 |
| ∴ 5 cm. ≡ |  | × 5 |  | = 62.5 kg. | |
| 0.4 |
