Question

If the period of oscillation of mass m suspended from a spring is 2 sec, then the period of mass 4m will be

• A. 1 sec
• B. 2 sec
• C. 3 sec
• D. 4 sec

Answer 1

Answer: (D)

4 sec

Answer 2

$T = 2 \pi \sqrt { \frac { m } { k } }$⇒$\frac { T _ { 2 } } { T _ { 1 } } = \sqrt { \frac { m _ { 2 } } { m _ { 1 } } } = \sqrt { \frac { 4 m } { m } } = 2$