Gujarati
Hindi
13.Oscillations
easy

The effective spring constant of two spring system as shown in figure will be 

A

$K_1 + K_2$

B

$K_1K_2/(K_1 + K_2)$

C

$K_1 -K_2$

D

$K_1K_2/(K_1 -K_2)$

Solution

When external force is applied, one spring gets extended and another gets contracted by the same distance, hence force due to two springs act in same direction.

$\text { i.e., } F=F_1+F_2 $

$-k x=-k_1 x-k_2 x $

$k=k_1+k_2 .$

Standard 11
Physics

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