- #1
Perpendicular component of momemtum?
- Thread starter ohheytai
- Start date
-
- Tags
- Component Perpendicular
Click For Summary
SUMMARY
The discussion centers around calculating the perpendicular component of momentum in a physics problem involving a string with variable length. The user initially applied the formula mv²/r with r set to 3.7 meters, resulting in a value of 214.05. However, this approach is incorrect due to the string's elasticity affecting the radius of curvature. The correct radius should be derived from the relaxed length of the string, which is given as 3.63 meters, but attempts to use this value also yield incorrect results.
PREREQUISITES- Understanding of momentum and its components in physics
- Familiarity with the concept of radius of curvature
- Knowledge of elasticity and its effects on physical systems
- Experience with applying formulas in physics problems
- Review the principles of momentum in physics, focusing on perpendicular components
- Study the relationship between elasticity and radius of curvature in strings
- Practice solving problems involving variable lengths and elastic materials
- Explore advanced physics topics related to dynamics and forces
Students studying physics, educators teaching momentum concepts, and anyone involved in solving complex mechanics problems related to elasticity and curvature.
- #2
tiny-tim
Science Advisor
Homework Helper
- 25,837
- 258
hi ohheytai! 
this is a really unpleasant question
i see that you've used mv2/r, with r = 3.7 (the length of the string), to get 214.05
that would be correct if the string was of fixed length, but unfortunately it isn't, so the radius of curvature won't be the same as the length of the string
on the basis of the information at the top of the question, i don't think there's any answer, since the answer depends on the radius of curvature, which depends on the elasticity, which you're given no clue about until part (e) (the relaxed length = 3.63m)
this is a really unpleasant question
i see that you've used mv2/r, with r = 3.7 (the length of the string), to get 214.05
that would be correct if the string was of fixed length, but unfortunately it isn't, so the radius of curvature won't be the same as the length of the string
on the basis of the information at the top of the question, i don't think there's any answer, since the answer depends on the radius of curvature, which depends on the elasticity, which you're given no clue about until part (e) (the relaxed length = 3.63m)
have you tried it using that 3.63?
- #3
ohheytai
- 81
- 0
doesnt work :(