A 1200-N crate rests on the floor. How much work is required to move it at constant speed (a) 5.0 m along the floor against a friction force of 230 N, and (b) 5.0 m vertically?
To Determine:(a) Work required moving it at a constant speed along the floor.
(b) Work required moving it at constant speed vertically.
Answer to Problem 4P
Solution: (a) 1150 J (b) 6000 J
Explanation of Solution
To move something against a frictional force, the force required will be equal or greater than frictional force, so the minimum force will be
Given:
Weight of the crate, F= 1200 N.
Friction force,
Distance along the floor,
Vertical Height,
Formula used:
Where, F is the required force.
W is the work done.
dis the distance or height.
Calculation: (a) Work required moving it at a constant speed along the floor:
(b) Work required moving it at constant speed vertically
Conclusion:Work required moving it at a constant speed along the floor is 1150 J and work required moving it at a constant speed along the floor 6000 J.
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