AP EAMCET Engineering 18 Sep 2020 Shift 2 Paper

The given situation is shown in the following figureWhen the block of 700g is removed, then period of oscillation is given as
T′=2π√‌

m

k

[where, k= spring constant ]
T′=2π√‌

0.9

k

But ⇒‌‌k=0.4π2....(i)
When both blocks of 700g and 500g are removed, then period of oscillation is given as
=2π√‌

0.4

0.4π2

   [ from Eq. (i)]
=‌

2π

π

=2s