• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Tough physics problems

  • Thread starter mobius
  • Start date
1
0
The Earth orbits the Sun once a year at a distance of 1.50x1011 m. Jupiter orbits the Sun at distance of 7.78 x 1011 m. These distances are between the centre of the planet and the sun. How long ( in earth days ) does it take for Jupiter to make one orbit around the Sun?

T(period = 8.64E4 sec) = 2πr^(3/2)/√(GMearth)

i have tried adding and subtracting the two radiis together and then plugging it into the equation...however it is incorrect....i am either not understanding the problem or is it just human error....?
 
Last edited:

chroot

Staff Emeritus
Science Advisor
Gold Member
10,166
34
Hi mobius,

We welcome homework problems here, in the Homework Help forum. We also ask that you attempt the problems first, and show us your work up to the point where you get stuck.

- Warren
 

Doc Al

Mentor
44,803
1,064
Originally posted by mobius
i cannot manipulate the formula in order to solve this, maybe it's because i do not understand the problem fully...i just need an explanation on setting this up....much appreciated
Start by identifying all the forces acting on the body (the pilot), then tell us what you know about acceleration, circular motion, and Newton's laws!
 
3
0
Hint: You use keplers third law where (time period)^2= (radius of orbit)^3
 
17
0
if I'm not understanding wrong, we have to find the 'relative' time period of the planet w.r.t earth. Here relative means : let car A & B start from pt. P in diff. Circles with diff. Speeds. Now relative time period will be that when both will reach pt. Again simultans. To do this problem u can take the help of concept of beats from waves.
Therefore use this:
1/T=1/T1 - 1/T2
Where T1 , T2 are the periods of earth and jupiter resp.
Tell me if it's right
 

Related Threads for: Tough physics problems

  • Posted
Replies
1
Views
898
  • Posted
Replies
5
Views
4K
  • Posted
Replies
1
Views
10K
Replies
2
Views
2K
Replies
5
Views
2K
Replies
1
Views
6K
Replies
3
Views
4K
  • Posted
Replies
1
Views
755

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top