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

Help with velocity

  • Thread starter kp270
  • Start date
  • #1
2
0

Homework Statement



Larry leaves home at 11:08 and runs at a constant speed to the lamppost. He reaches the lamppost at 11:17, immediately turns, and runs to the tree. Larry arrives at the tree at 11:22. What is Larry's average velocity during his trip from home to the lamppost, if the lamppost is 371.0 m west of home, and the tree is 630.0 m east of home?

Homework Equations



v=d/t

The Attempt at a Solution



This is what i've done:
d=371 m
t = (9*60) = 540 s

v=371/540
=0.687 m/s

I'm just wondering what I am doing wrong can someone please help me
 

Answers and Replies

  • #2
CompuChip
Science Advisor
Homework Helper
4,302
47
I am wondering what you are doing wrong as well. Why do you think it is wrong? Because I think you did the calculation correctly.
 
  • #3
dx
Homework Helper
Gold Member
2,011
18
Is the positive direction of the x-axis pointing east or west? If it's pointing east then you're missing a minus sign.
 
  • #4
181
0
I strongly suspect that the question meant to ask for the average
velocity from home to the tree.
 
  • #5
2
0
Thanks and I was missing the a negative
 

Related Threads for: Help with velocity

  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
4
Views
875
  • Last Post
Replies
3
Views
558
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
2
Views
7K
  • Last Post
Replies
5
Views
10K
  • Last Post
Replies
3
Views
742
Top