2-D Kinematics Vector Resolution

  • Thread starter endverse
  • Start date
  • #1
10
0

Homework Statement


Snoopy is running to his doghouse at 3.0 m/s [N 15° E] for 35 s. Charlie has a bone and calls his dog back. Snoopy immediately turns around and runs towards Charlie at 4.5 m/s [S 45° W] for 30 s. Find Snoopy's displacement.


Homework Equations


dt = d1 + d2
d1=d1x + d1y & d2=d2x + d2y
d1x = V1x/t

The Attempt at a Solution


Ok so I've started off with the components. N, E (+) and W, S (-)
V1x = (3.0)(sin15) & V1y = (3.0)(cos15)
V2x = (-4.5)(cos45) & V2y = (-4.5)(sin 45)

d1x = V1x/t
= (3.0)(sin15)/35
= 0.022m

d1y = V1y/t
= (3.0)(cos75)/35
= 0.083m
Therefore d1=0.022+0.083 = 0.11m...

I did the same thing for d2, splitting it up into its component parts. I know that after this I have to use d1, d2 and dr in the pythagorean theorem to find magnitude and then find the vector direction with the tan ratio. I'm just wondering if so far I am on the right track
 

Answers and Replies

  • #2
10
0
Agh sorry, please lock this thread. I just rearranged incorrectly for d... it's d=vt not d=v/t
:\
 

Related Threads on 2-D Kinematics Vector Resolution

  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
15
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
2
Views
12K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
14
Views
2K
Top