Two blocks A and B of masses m & 2m respectively are held at rest such that the spring is in natural length. Find out the accelerations of blocks A and B respectively just after releasing both blocks. (pulley, string and spring are massless)

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Block A ( m ): m a A ​ = m g a A ​ = g ↓ Block B ( 2 m ): 2 m a B ​ = 2 m g a B ​ = g ↓ a A ​ = g ↓ , a B ​ = g ↓ As just after releasing spring force remains same i.e it will remain 0, hence tension will also remain 0.

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