. A 30 kilogram of box of fruits is being pushed on a cemented floor. If it is pushed on a 4.5-meter distance at a constant velocity and the coefficient of kinetic friction is 0.25. a) Find the force that should applied on the box. b) Compute the work done on the box by the force in (a). c) Find the work done on the box by the friction, d) work done on box by the normal force, e) by the gravity. f) Compute the total work on the box of fruits. 4. Suppose the box in problem number 3 is pushed downward at an angle of 30° below the horizontal. (a) What magnitude of force must be applied to move the crate at constant velocity? (b) How much work is done on the box by this force when the box is pushed a distance of 4.5 m? (c) How much work is done on the box by friction during this displacement? (d) How much work is done on the crate by the normal force? (e) By gravity? (f) What is the total work done on the crate

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