Conical Pendulum Homework: Find Ratio of Tangential Speeds

AI Thread Summary
The discussion revolves around calculating the ratio of tangential speeds (V2/V1) for two conical pendulums with different masses and lengths, both at an angle of 33 degrees. The user initially derived the formula for tangential speed but mistakenly concluded the ratio as 1/2 instead of the correct V2/V1. A contributor pointed out that the user had confused the ratio direction, clarifying that the correct interpretation should yield a different result. The conversation highlights the importance of careful attention to ratio definitions in physics problems. Ultimately, the user expresses gratitude for the clarification provided.
Momentum09
Messages
69
Reaction score
0

Homework Statement



Consider 2 conical pendulums. The first one has mass M and length L and the second has mass 4M and Length 4L. For both parts the angle theta is 33 degrees. The ratio of the tangential speeds of the two circular motions V2/V1 is?

Homework Equations



I know that tan(theta) = V^2/rg. I rearranged the equation to get V = square root of [gtan(theta)/r], where r = Lsin(theta). I keep getting the ratio 1/2, but it's wrong. Can someone please point out my mistake?

The Attempt at a Solution



Thanks!
 
Physics news on Phys.org
I'm guessing you found the ratio of V1/V2 to be 1/2, but the question is asking for V2/V1 :wink:
I think that's the only problem.
 
lol, thank you so much! :) You're a great help!
 
Glad I could help!
 

Thread 'Rolling without slipping on a curved surface'

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 .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

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...
View full post »
Thread 'A bead-mass oscillatory system problem'

Thread 'A bead-mass oscillatory system problem'

I can't figure out how to find the velocity of the particle at 37 degrees. Basically the bead moves with velocity towards right let's call it v1. The particle moves with some velocity v2. In frame of the bead, the particle is performing circular motion. So v of particle wrt bead would be perpendicular to the string. But how would I find the velocity of particle in ground frame? I tried using vectors to figure it out and the angle is coming out to be extremely long. One equation is by work...
View full post »

Similar threads

Work done on a conical pendulum
Replies
3
Views
2K
The period of a simple pendulum
Replies
20
Views
2K
Foucault Pendulum at the North Pole
Replies
9
Views
2K
Simulating a Rotary Inverted Pendulum in Python
Replies
15
Views
1K
Max Impulse on a pendulum
Replies
1
Views
819
Conic Pendulum Exercise: Tension and Velocity as Functions of Angle
Replies
4
Views
2K
Question about a Conical Pendulum
Replies
1
Views
2K
Conical pendulum in rotating frame
Replies
1
Views
2K
Tough physics problem. Conical pendulum.
Replies
2
Views
3K
An issue with Conical Pendulums
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top