JEE Main 2020 (3 Sep, Shift 2) Physics Q9: Energy in SHM

Question

A block of mass m attached to a massless spring is performing oscillatory motion of amplitude 'A' on a frictionless horizontal plane. If half of the mass of the block breaks off when it is passing through its equilibrium point, the amplitude of oscillation for the remaining system become

f

A. The value of

f

is :

(1) $\sqrt{2}$
(2) $\frac{1}{\sqrt{2}}$ Official answer
(3)1
(4) $\frac{1}{2}$

Official answer

Option 2

NTA final key (Sep 2020).

Accepted Answer

Option 2: $\frac{1}{\sqrt{2}}$

Answer

$\sqrt{2}$

Answer

$\frac{1}{\sqrt{2}}$

Answer

1

Answer

$\frac{1}{2}$

JEE Main 3 September 2020, Shift 2, Physics Q9

Same idea in other shifts