Is Work Done by a Satellite Related to its Mass and Displacement?

AI Thread Summary
The discussion focuses on the calculation of work done by a satellite in orbit around the Earth. It emphasizes that work is defined as the dot product of force and displacement, rather than a simple multiplication. The conversation highlights the importance of understanding the relationship between force, displacement, and the angle between them in determining work. The satellite's mass and constant altitude are acknowledged but clarified that they do not directly affect the work done in this context. Overall, the correct interpretation of work in physics is crucial for solving related problems.
labview1958
Messages
37
Reaction score
0

Homework Statement





Homework Equations


What is the work done by a satellite moving around the Earth at constant altitude. Work done = Force x displacement. The satellite has a mass and displacement. Should it have work?



The Attempt at a Solution


 
Physics news on Phys.org
hi labview1958! :wink:
labview1958 said:
Work done = Force x displacement.

no NO NO!

work done = force "dot" displacement :smile:
 
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 '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