- #1
wasteofo2
- 478
- 2
I'm using my teacher's study guide to study for a test, and he has the answers on it. I think he's just wrong with one.
Here's the question: A book weighing 20. N slides at a constant velocity down a ramp inclined at 30 degrees to the horizontal. What is the force of friction between the book and the ramp.
I know the force of friction has to be equal to the force of the book sliding down the ramp, since it's sliding with a constant velocity.
As far as I know, all I should have to do is sin30 = 20N/x
That gives me 40N.
The answers say 10N is the FF between the book and ramp.
Did my teacher just mess up?
Here's the question: A book weighing 20. N slides at a constant velocity down a ramp inclined at 30 degrees to the horizontal. What is the force of friction between the book and the ramp.
I know the force of friction has to be equal to the force of the book sliding down the ramp, since it's sliding with a constant velocity.
As far as I know, all I should have to do is sin30 = 20N/x
That gives me 40N.
The answers say 10N is the FF between the book and ramp.
Did my teacher just mess up?