Conservation of Momentum in Two Dimensions involving a barge collision

AI Thread Summary
The discussion revolves around a physics problem involving the conservation of momentum in a two-dimensional collision between two barges. The first barge, with a mass of 1.50 X 10^5 kg, is moving downriver at 6.2 m/s, while the second barge, with a mass of 2.78 X 10^5 kg, is moving across the river at 4.3 m/s before the collision. After the impact, the second barge changes direction by 18 degrees and increases its speed to 5.1 m/s. Participants in the thread seek guidance on calculating the speed and direction of the first barge post-collision, emphasizing the need for a clear explanation of the formulas and methods used to arrive at the solution. The conversation highlights the importance of applying the principles of momentum conservation to solve the problem effectively.
physics newb
Messages
44
Reaction score
0
A barge with mass 1.50 X 10^5 kg is proceeding downriver at 6.2 m/s in heavy fog when it collides with a barge heading directly across the river (see the poorly drawn image, in link)http://img.photobucket.com/albums/v638/ravenatic20/untitled4.jpg ...
The second barge has mass 2.78 X 10^5 kg and before the collision is moving at 4.3 m/s. Immediately after impact, the second barge finds its course deflected by 18 degrees in the downriver direction, and its speed increased to 5.1 m/s.

The river current is approximately zero at the time of the accident. What are the speed and direction of motion of the first barge immediately after the collision? What formulas did you use to solve this, and how did you solve it? In other words, explain how you came to your answer.

Any help would be great!
 
Last edited by a moderator:
Physics news on Phys.org
First, this is a physics problem, not a math problem so I'm moving it. Second, I see no indication at all of what you have done or tried on this problem yourself.
 
No, I haven't. That's why I'm here. What do I do?
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top