A box sits on the horizontal bed of a truck accelerating to the left as shown. Static friction between the box and the truck keeps the box from sliding around as the truck accelerates.
Previous question is:
1) The work done on the box by the static friction force as the accelerating truck moves a distance D to the left is
d) dependent on the speed of the truck.
Student Log for the following question:
2) Briefly explain your choice for the above question.1
Instructors gain insight into student understanding and can use these comments as potential starting points in a lecture.Problems »
|Student||Answer||Anwser to previous question||Time on Prelecture|
|Stew Dent||I don't know||1||00:42|
|Adam Smith||Because the work done on the box by the static friction force is positive||3||11:53|