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Question: a student moves a 280 kg box of books from...

Question details

A student moves a 28.0 kg box of books from the faculty room to the library, which is 20 m away, the static and kinetic coefficients of friction between the box and the floor are 0.40 and 0.25 respectively. Frist, she attaches a rope forming an angle of 35º with respect to the horizontal and then she pulls it.

If she wants to move the box at a constant velocity,

  1. What is the magnitude of the force that she must apply to the rope?
  2. What is the average work done to move the box
  3. What is the final velocity of the box?

If she applies a force of 105 N to he rope:

  1. What would be the acceleration of the box?
  2. What is the average work done to move the box?
  3. What is the final velocity of the box?

Required Procedure:

1) Make a list of the given variables

2) Draw a FBD with the forces acting on the box.

3) Show your calculations.

Required Procedure:

1) Make a list of the given variables

2) Draw a FBD with the forces acting on the box.

3) Show your calculations.

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