A constant force acting on a body of mass `3 kg` changes its speed from `2ms^(-1)` to `3.5 ms^(-1)` in 25 s. The direction of motion of the body remains unchanged . Calculte magnitutude and direction of the force .
A. 18 m in the direction of motion
B. 0.32m in the direction of motion
C. 0.64m in the direction of motion
D. 0.16 m in the direction of motion