Science
posted by Dwi on .
A box of 5 kg mass slides horizontally on the floor for along a distance 9m in 3s due to a constant force. The magnitude of the constant force is ...

Is there friction? Is it accelerating from an initial speed of zero? More information is needed.
If it starts out with zero velocity, it acquires a final speed of 6 m/s. (Twice the average speed).
If there is no friction, final KE = Work done.
(1/2)M*Vfinal^2 = Force*Distance
Solve for the force