Question

The time period of mass suspended from a spring is $T$. If the spring is cut into four equal parts and the same mass is suspended from one of the parts, then the new time period will be

• A. T/4
• B. T
• C. T/2
• D. 2T

Answer 1

Answer: (C)

T/2

Answer 2

$K \ell=$ constant $\Rightarrow K '=4 K$
$\& T =2 \pi \sqrt{\frac{ m }{ K }}$
$\Rightarrow T'=\frac{ T }{2}$