How to calculate impulse when velocity is angled?

  • Thread starter Thread starter okgo
  • Start date Start date
  • Tags Tags
    Impulse Velocity
Click For Summary
To calculate impulse when velocity is angled, it is essential to find the individual x and y components of the velocities, as momentum is a vector quantity. The discussion highlights the importance of differentiating between impulse and momentum, emphasizing that impulse represents the change in momentum. For the object with a mass of 2m, the calculation should not simply be 2m*3 - 2m*6 without considering the components. Understanding these components is crucial for accurate calculations of impulse. Thus, correctly applying the change in impulse equation requires a thorough analysis of both velocity components.
okgo
Messages
61
Reaction score
0

Homework Statement


Compare impulse for the two objects

http://www.screencast.com/users/trinhn812/folders/Jing/media/ecf05e80-8fa7-435c-bfa0-891cf13b176a



Homework Equations



Change in impulse equation

The Attempt at a Solution


When you calculate impulse do you have to find the individual x and y component?
So for object 2m it can't be:

2m*3-2m*6
right?
 
Physics news on Phys.org
yes, find the x and y components of the velocities; momentum is a vector quantity. you talked about impulse...I think you meant momentum...
 
impulse is change in momentum :wink:
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

Similar threads

  • · Replies 17 ·
Replies
17
Views
4K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 4 ·
Replies
4
Views
5K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
30
Views
5K
  • · Replies 7 ·
Replies
7
Views
4K
Replies
2
Views
2K
  • · Replies 24 ·
Replies
24
Views
3K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K