Can You Solve These General Physics Problems?

AI Thread Summary
The discussion revolves around three physics problems related to dynamics, circular motion, and gravitational forces, posed by a new member seeking to test the knowledge of forum participants. The first problem involves calculating the linear speed of a person on a ferris wheel at a specific position, while the second requires determining the maximum safe speed for a car rounding a curve based on road conditions. The third problem asks for the gravitational forces between the Earth, Moon, and Sun, including a comparison of their magnitudes. Participants are encouraged to share their solutions and the equations used, with some skepticism about the original poster's claimed answers. The thread highlights a community-driven approach to solving physics problems and sharing knowledge.
NewtonJR.215
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Just interested in seeing what peoples answers are to these questions. I am new to the site so this could be considered a test of how well the members of this forums acutally know physics.{I've done this problems and have answers} Interested in seeing which equations you used also.


Problem 1 {Dynamics of Uniform Circular Motion}
The linear speed(Velocity) of a person riding a ferris wheel is 8.0m/s. What would be this person's linear speed if they were clinging to a spot halfway between the center of the wheel and the outer edge?

Problem 2 {A car rounding a curve}
A car with mass of 2565kg is rounding a horizontal curve of radius 76m. What is the maximum safe speed the car can maintain around the curve. Where m=0.73(dry road) and m=0.30(wet road)

Problem 3 {Gravitational Forces}
Calculate the gravitational force of:
-The sun and the earth
-The moon and the Earth
-Which is larger and how many times larger is it?

Earth: mass 5.97*10^24 kg
Radius 6,380,000 meters
Moon: mass 7.35 *10^22 kg
Radius 1,740,000 meters
Sun: mass 1.99*10^30
Radius 696,000,000

GOOD LUCK!
 
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NewtonJR.215 said:
Just interested in seeing what peoples answers are to these questions. I am new to the site so this could be considered a test of how well the members of this forums acutally know physics.{I've done this problems and have answers} Interested in seeing which equations you used also.
Hi NewtonJR,

I don't think you're being completely honest with us are you?

Furthermore, how do you know that your answers are correct?
 
NewtonJR.215 said:
Just interested in seeing what peoples answers are to these questions. I am new to the site so this could be considered a test of how well the members of this forums acutally know physics.
:smile: Nice try!

{I've done this problems and have answers} Interested in seeing which equations you used also.
How about this: You show your detailed solutions and we'll be happy to comment.

Please review our posting rules, which are linked at the top of every page, and the https://www.physicsforums.com/showthread.php?t=94379".
 
Last edited by a moderator:
hah thought I'd try. I'll post the answers up in a few hours.:approve:
 
Posted 2 problems up so far in the Homework, General Physics section. I can't post links because my post count is< 15. :cry:
 

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