Register to reply 
Centripetal Force vs. Gravity 
Share this thread: 
#1
Feb2209, 03:55 AM

P: 3

Hi,
I'm currently taking 1st semester Physics and am trying to understand centripetal force relative to the Earth's rotation. From what I understand (using a bucket of water tied to a string as an example), swinging a bucket in a circular motion, when the bucket is completely above your head, gravity will pull the water towards the bottom of the bucket (in this case up, away from the string) while centripetal force (pointing inward towards the string) is what keeps the bucket from flying off in the direction of velocity. If this is so does this mean that what we interpret as gravity (9.8 m/s^2) "pulling" us down towards the Earth in actuality is centripetal force while the "true" gravitational force points 180 degrees in the opposing direction (in this case up towards the sky?) I spent a good hour looking online for answers and have reread my textbook 3 times and still need clarification. Any help is appreciated. Thanks in advance! 


#2
Feb2209, 07:46 AM

Mentor
P: 41,471




#3
Feb2209, 08:04 AM

P: 3

Crap, I just realized I was only thinking in terms of the Earth.
The centripetal force for the Earth is provided by its revolving around the Sun correct? 


#4
Feb2209, 08:18 AM

Mentor
P: 41,471

Centripetal Force vs. Gravity



#5
Feb2209, 08:21 AM

P: 3




#6
Mar109, 12:58 PM

P: 33

Sorry to bring this question back from the dead, but if tension and gravity are both causing centripetal acceleration and therefore a centripetal force toward the center than what keeps the bucket and water up? What is this force and is there a way to explain it.



#7
Mar109, 03:03 PM

Mentor
P: 41,471




Register to reply 
Related Discussions  
Centripetal Force vs Gravity  Classical Physics  5  
Centripetal Force  Introductory Physics Homework  2  
Centripetal forces and gravity  Astronomy & Astrophysics  0  
Ranking net force/ centripetal force problem  Introductory Physics Homework  1  
Centripetal Force  Introductory Physics Homework  1 