Two bodies of mass 3kg and 4kg are suspended at the ends of massless string passing over a frictionless pulley. The acceleration of the system is (`g=9.8m//s^(2)`)

Options

A. `4.9 m//s^(2)`
B. `2.45 m//s^(2)`
C. `1.4 m//s^(2)`
D. `9.5 m//s^(2)`

Answer

C

Explanation

`a=((4-3)g)/((4+3))=(g)/(7)=(9.8)/(7)=1.4m//s^(2)`