A 60 kg body is pushed with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficient of static friction and sliding friction are 0.5 and 0.4 respectively. The acceleration of the body is
A. `6m//s^(2)`
B. `4.9m//s^(2)`
C. `3.92m//s^(2)`
D. `1m//s^(2)`
