Two block of mass 4 kg and 5 kg attached a light spring are suspended by a string as shown in figure. Find acceleration of block 5 kg and 4 kg just after the string is cut.

Options

A. `8 m//s^(2), 10 m//s^(2)`
B. `10 m//s^(2), 10 m//s^(2)`
C. `18 m//s^(2), 0`
D. `8 m//s^(2), 0`

Answer

C

Explanation

When string is cut tension in string becomes zero. But spring doesn’t change its shape just after cutting the string
kx = 40 N
So force due to spring on both
Blocks remains same