Question 3 (2 points) A book is sliding down freely (no external force is applied) along an inclined plane with friction at a constant speed. Which of the following statements regarding the works done by gravitational and frictional force is correct [ Read the question carefully again] Note : For this question please refer to Question 6 of the lab report. A) Gravity does a positive work and friction does a negative work by the same amount resulting in a net workdone of zero. B) Gravity does a negative work and friction does a positive work by the same amount resulting in a net workdone of zero. C) Workdone by gravity and friction are equal and are both negative. (D) Workdone by gravity and friction are equal and are both positive