Have 2 Questions: Measure Perihelion of Venus & Pendulum in Elevator

  • Thread starter Thread starter leafvillage
  • Start date Start date
AI Thread Summary
Measuring the perihelion advance of Venus is challenging due to the influence of gravitational perturbations from other planets and relativistic effects that complicate precise calculations. In the scenario of a pendulum in a falling elevator, the pendulum would remain stationary relative to the elevator, as both are in free fall, creating a weightless environment. The discussion emphasizes that these questions may not be suitable for a relativity-focused forum, suggesting they are more appropriate for a general physics or homework section. Participants note the importance of considering factors like air resistance and initial conditions for accurate analysis. Overall, the conversation highlights the complexities of gravitational interactions and motion in non-inertial reference frames.
leafvillage
Messages
3
Reaction score
0
URGENT: Have 2 questions

I got 2 questions, if anyone can answer one or both of them, ill appreciate it. thanks!
8. Why is it difficult to measure the perihelion advance of the planet Venus?
9. You are in an elevator at the top of the CN tower. You have a pendulum
and allow it to oscillate. The elevator falls to the ground after someone
cuts its support cables. What does the pendulum do? Ignore the air
resistance acting on the pendulum and the elevator.
 
Physics news on Phys.org
If these are homework problems, you should post them in one of the homework forums, not here (they have nothing to do with relativity, anyway).
 
i thought these questiosn belonged to the relativity section bout space time and such...sry
 
I believe u would need to consider air resistance and the position at which the pendulum was at.
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Simple Pendulum in Free Fall: Surprising Motion and Video Evidence
Replies
7
Views
3K
Help(Pendulum in a falling elevator)
Replies
11
Views
12K
How Does a Pendulum React in Freefall? CN Tower Experiment
Replies
2
Views
2K
I On whether the motion of a Foucault pendulum bob is comparable to ballistics
Replies
10
Views
2K
Finding the value of g using 2nd Harmonic Frequency
Replies
3
Views
3K
Pendulum & Basketball Lab(Accelration due to gravity)
Replies
4
Views
2K
Pendulum in Freefall from CN Tower: Help!
Replies
17
Views
4K
How Can We Harness the Power of Space Elevators and Atmospheric Electricity?
Replies
7
Views
2K
How Do Elevator Accelerations Affect Weight Measurements?
Replies
2
Views
8K
Releasing the object from Space Elevator
Replies
5
Views
5K

Hot Threads

Recent Insights

Back
Top