Assertion: The periodic time of a hard spring is less as compared to that of a soft spring.
Reason: The periodic time depends upon the spring constant, and spring constant is large for hard spring

Moderate

A

If both statement I and statement II are true and statement II is the correct explanation of statement I.
B

If both statement I and statement II are true but statement II is not the correct explanation of statement I.
C

If statement I is true but statement II is false
D

If both statement I and statement II are false

Solution

The time period of a oscillating spring is given by, $T = 2 π \sqrt{\frac{π}{k}} \Rightarrow T \propto \frac{1}{\sqrt{k}}$ . Since the spring constant is large for hard spring, therefore hard spring has a less periodic time as compared to soft spring.

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