• Support PF! Buy your school textbooks, materials and every day products Here!

Friction at an angle verification

  • #1
Hey, i just want to make sure i'm doing this right:

At the end of a factory production line, boxes start from rest and slide down a 30o ramp 5.4 m long. If the slide is to take no more than 3.3 s, what is the maximum coefficient of friction between the box and the slide?


I first found out the acceleration:
5.4=0.5a(3.3)^2
a=.99m/s^2
so i then did
mgsinTHETA-umgcosTHETA=ma (mass cancels out)
4.9-8.5u=0.99
-8.5u=-3.91
u=.46.....the coefficent of friction, it seems to work..

however i still need help on my post "Tension and centripital force revisited"
THANKS for alll ya'lls help
 

Answers and Replies

  • #2
45
0
Hey, i just want to make sure i'm doing this right:

At the end of a factory production line, boxes start from rest and slide down a 30o ramp 5.4 m long. If the slide is to take no more than 3.3 s, what is the maximum coefficient of friction between the box and the slide?


I first found out the acceleration:
5.4=0.5a(3.3)^2
a=.99m/s^2
so i then did
mgsinTHETA-umgcosTHETA=ma (mass cancels out)
4.9-8.5u=0.99
-8.5u=-3.91
u=.46.....the coefficent of friction, it seems to work..

however i still need help on my post "Tension and centripital force revisited"
THANKS for alll ya'lls help
I didn't check the numbers, but your method seems correct.
 

Related Threads for: Friction at an angle verification

  • Last Post
Replies
1
Views
870
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
2
Views
753
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
4
Views
641
  • Last Post
Replies
7
Views
798
  • Last Post
Replies
7
Views
1K
Top