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

Momentum of 2 Joggers

  • Thread starter CaptFormal
  • Start date
  • #1
33
0

Homework Statement


An 81.8 kg jogger is heading due east at a speed of 1.81 m/s. A 54.4 kg jogger is heading 32.2° north of east at a speed of 3.00 m/s. Calculate the magnitude of the sum of the momenta of the two joggers.


Homework Equations


m1v1 + m2v2 = m1v1' + m2v2'


The Attempt at a Solution


Since they want the sum of the momenta I figured it meant that I would just add up the masses and the velocities as follows:

(81.8)(1.81) + (54.4)(3.00)

However, that was not the correct answer. Also the angle is throwing me off a bit as I don't see how it could fit into this problem. Any help will be greatly appreciated. Thanks.

Sincerely,
CaptFormal
 

Answers and Replies

  • #2
mgb_phys
Science Advisor
Homework Helper
7,774
12
Draw a diagram
Remember the momentum in Y (north-south) and X (east-west) is conserved.
 

Related Threads on Momentum of 2 Joggers

  • Last Post
Replies
5
Views
5K
  • Last Post
Replies
3
Views
3K
Replies
2
Views
2K
  • Last Post
Replies
2
Views
9K
  • Last Post
Replies
9
Views
5K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
2
Views
3K
Top