Two masses 10 kg and 20 kg respectively are connected by a massless spring as shown in figure force of 200 N acts on the 20 kg mass. At the instant shown is figure the 10 kg mass has acceleration of `12m//s^(2)` what is the acceleration of 20 kg mass?

Options

A. Zero
B. `10 m//s^(2)`
C. `4 m//s^(2)`
D. `12 m//s^(2)`

Answer

C

Explanation

`F=10xx12=120`
`(80)/(20)=4m//s^(2)`