# 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,

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

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

- What would be the acceleration of the box?
- What is the average work done to move the box?
- 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.