What Is the Acceleration Due to Gravity on Titania?

AI Thread Summary
The discussion focuses on calculating the acceleration due to gravity on Titania, Uranus's largest moon. The user initially misapplies the gravitational force equations, resulting in an incorrect value of 4.99E8 m/s^2, while the correct acceleration is 0.37 m/s^2. The user realizes that they should use the same formula for gravity as used for Earth, indicating a misunderstanding of the application of the equations. The conversation highlights the importance of correctly applying gravitational formulas to different celestial bodies. Ultimately, the user acknowledges their error in the calculations.
Eagle's Wings
Messages
17
Reaction score
1

Homework Statement



Titania, the largest moon of the planet Uranus, has 1/8 the radius of the Earth and 1/1700 the mass of the earth. a) What is the acceleration due to gravity at the surface of Titania? b) What is the average density of Titania?

Homework Equations



F_{g} = \frac{Gm_{E}m}{r^{2}}
F_{g} = ma

The Attempt at a Solution



I haven't looked at part b) yet because I use the above equations and I get 4.99E8 m/s^2, but the real answer is 0.37 m/s^2...not sure what I'm doing wrong. Am I even using the right equations?
 
Last edited:
Physics news on Phys.org
wait, never mind. it is asking for the gravity on that moon so I just use the same equation used to find gravity on the earth. Answer to my own question: yes, yes you are using the wrong equations.
 
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...
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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...
Back
Top