Oscillations and Gravity


by pdiddy94
Tags: gravity, oscillations
pdiddy94
pdiddy94 is offline
#1
May8-12, 12:37 AM
P: 2
On the planet Newtonia, a simple pendulum having a bob with mass 1.00 and a length of 195.0 takes 1.40 , when released from rest, to swing through an angle of 12.5 , where it again has zero speed. The circumference of Newtonia is measured to be 51400 .

I solved for g using T = 2pi*sqrt(L/g) and then i used this g plus the constant G and the radius solved from the given circumference to calculate the mass of the planet from the equation g = GM/R^2 but can't get the answer, i don't know if its because I'm not taking the angle into account?
Phys.Org News Partner Science news on Phys.org
Cougars' diverse diet helped them survive the Pleistocene mass extinction
Cyber risks can cause disruption on scale of 2008 crisis, study says
Mantis shrimp stronger than airplanes
tiny-tim
tiny-tim is offline
#2
May8-12, 07:00 AM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,167
hi pdiddy94! welcome to pf!
Quote Quote by pdiddy94 View Post
takes 1.40 , when released from rest, to swing through an angle of 12.5 , where it again has zero speed.

i don't know if its because I'm not taking the angle into account?
the angle makes no difference (so long as it's reasonably small, as 12.5 is),

but the period T is for two swings, isn't it?
pdiddy94
pdiddy94 is offline
#3
May8-12, 10:52 AM
P: 2
ohh, thank you that makes sense


Register to reply

Related Discussions
Does gravity affect gravity the way gravity affects time? General Physics 12
oscillations Introductory Physics Homework 2
oscillations Introductory Physics Homework 2
Oscillations Introductory Physics Homework 3
Oscillations Introductory Physics Homework 4