Correct Answer: Option D

Explanation

From Hoke's Law, F = ke, K = Constant of Force

For he first case, Force = mg,

= 0.8 × 10 = 8N

∴ 8 = k × 0.04

k = \(\frac{8}{0.04}\)

= \(\frac{200N}{m}\)

Since K is constant

For the second case, F = ke

F = 200 × e

∴ e = \(\frac{F}{200}\)

= \(\frac{16}{200}\)

= 0.08m

There is an explanation video available below.

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