- #1
nikhi
- 2
- 0
Homework Statement
1) According to an object's distance vs. force (parallel) graph, what is the work done in this process as the object moves from 2 m to 8 m?
2) a book is pushed up an 8 degree inclined plane with an initial speed of 11 m/s. If the coefficient of kinetic friction between the book and the plane is 0.15, what is the distance up the incline the book will slide?
Homework Equations
W=Force*distance
friction=mu(Normal Force)
conservation of mechanical energy equation:
E1=E2 + Wf
The Attempt at a Solution
the first ones answer is 1650 J but i have no idea why!
second one: (IS WRONG, SO PLZ HELP)
.5 mv^2 = friction*distance
distance=.5v^2/ .15 *9.8 *cos 8
d= 41.5