Friction Question an incline plane with two angles

  • #1
Ok I just can't see this questions I don't want an answer I just whant an explation on how to do it. if you can respond today it would be great thanks! an simple drawing like I did would be great thanks!

a block weighing 100 newtons is positioned on a incline that makes an angle of 30 degrees with the horizontal. The friction force between the block and the incline is 10 newtons. A force of 120 newtons is applied by pulling on a rope that makes an angle of 30 degrees with the incline as shown in attachment.

1. Determine the components of the block's weight parallel to incline (is that Fg?)

2. Determine the magnitude and direction of the componet of the tension that is useful in moving the block up the incline. (tension)

3. Determine the magnitude and direction of the block acceleration.
 

Attachments

  • drawing 2.bmp
    95 KB · Views: 597

Answers and Replies

  • #2
daniel_i_l
Gold Member
867
0
For 1 and 2:
set up the coordinate system so that the x-axis is paralell to the incline.
for 1 find the angle between the x-axis and the weight (gravitational force) of the block. Then multiply by cos(angle). Same for 2.
For 3, find the sum of the forces on the x-axis and the y-axis. Then use F=ma.
 

Related Threads on Friction Question an incline plane with two angles

  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
4
Views
2K
Replies
7
Views
877
Replies
6
Views
5K
  • Last Post
Replies
6
Views
4K
  • Last Post
Replies
7
Views
3K
  • Last Post
Replies
3
Views
1K
Replies
2
Views
15K
  • Last Post
Replies
3
Views
661
Top