Question1
A 115kg mail bag hangs by a vertical rope 4.0 long. A postal worker then displaces bag to a position 2.2m sideways from its original position, always keeping the rope taut.
1. What horizontal force is required to hold bag in the new position?
2. As the bag is moved to this position, how much work is completed by the rope?
3. As the bag is moved to this position, how much work is completed by the worker?
Question2
A box of books weighing 351 N moves with a constant velocity across floor as it is pushed with a force of 416 N exerted downward at an angle of 38.7? below the horizontal.
Find out μk between box and floor.