Why did our conservation of momentum experiment have unexpected results?

Click For Summary
SUMMARY

The discussion centers on an experiment involving the conservation of momentum using marbles on a ramp. The experiment yielded consistent results in four out of five trials, where the momentum was conserved, but one trial unexpectedly showed an increase in momentum. Participants debated the possibility of human error, miscalculations, or unaccounted variables like friction and air resistance. The conversation highlights the importance of meticulous experimental design and the need to consider all factors influencing momentum in physics experiments.

PREREQUISITES
  • Understanding of conservation of momentum principles
  • Basic knowledge of vector addition in physics
  • Familiarity with experimental design and error analysis
  • Awareness of factors affecting motion, such as friction and air resistance
NEXT STEPS
  • Research advanced concepts in momentum conservation experiments
  • Learn about error analysis techniques in physics experiments
  • Explore the effects of friction and air resistance on motion
  • Investigate vector decomposition and its applications in physics
USEFUL FOR

Students, educators, and physics enthusiasts interested in experimental physics, particularly those studying momentum and its conservation in practical scenarios.

_X3R0_
I was doing a lab one day in school and me and my teacher noticed something this isn't homework. We were wondering about conservation of momentum in the lab. The way it was done was we attached a small little ramp on the table. On the ramp we put a marble and let it slide down the ramp and onto the floor. We recorded this distance quite accuratly. Now then we put a second marble at the bottom of the ramp and so we let it hit the marble at an angle so that they would fly off in vectors and have both x and y components. Now we did this about 5 times. Out of the 5 times it worked out the way it should have the two vectors were added together and we got the same amount of momentum give or take a slight bit due to friction and air resistance. Now the 1 out of the 5 time that we did it we noticed that the momentum actually increased. Obviously we found this to be weird and it was to much for it to be human error. We did it agian same procedure same results 4 out of 5 worked but that one did the same thing. Now my question is its almost as if momentum was created somehow but that doesn't go wiht the rule of conservation of momentum. Now how could this happen. (and yes we checked the friction and the original momentum vector to make sure nothing happened and all that jazz.)
 
Physics news on Phys.org
If what you say is true...very interesting. But chances are you made a miscalculation somewhere, but i could be wrong...who knows? i don't. i wasn't there. Sorry can't help you here.
 
Last edited:
... possibly different weights and you didn't know?

Large errors are usually almost exclusively the realm of human errors too :P
 

Similar threads

  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 53 ·
2
Replies
53
Views
5K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 36 ·
2
Replies
36
Views
16K
  • · Replies 39 ·
2
Replies
39
Views
4K
  • · Replies 13 ·
Replies
13
Views
3K
  • · Replies 15 ·
Replies
15
Views
4K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 35 ·
2
Replies
35
Views
5K
  • · Replies 3 ·
Replies
3
Views
2K