Two masses and , each of mass are fixed together by a massless spring, A force acts on the mass as shown in figure. If the mass starts moving away from mass with acceleration , then the acceleration of mass will be :

Two masses and , each of mass are fixed together by a massless spring, A force acts on the mass as shown in figure. If the mass starts moving away from mass with acceleration , then the acceleration of mass will be :

Asked in: JEE Main 2021 (26 Feb Shift 2)