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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 ...

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    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

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