Forces & Fields HELP

  • Thread starter natural
  • Start date
  • #1
26
0

Homework Statement



Forces & Fields
Calculate the acceleration of the earth in its orbit around the sun and the net force exerted on the Earth.what exerts this force on the earth? Assume that the Earth's Orbit is a circle of radius 1.49*10^11m.

Homework Equations


g=GMm/r2
1 year=3.16*10^7
mass of the earth = 5.98*10^24kg
radius of the earth = 6.37*10^6m.

The Attempt at a Solution


I was approaching the question by using the equ. v2(v squared)/r.
but velocity is unknown and the distance between the sun and the earth.:confused:
 

Answers and Replies

  • #2
225
0
It's easy to find the speed--it's just distance per unit time.
 
  • #3
Astronuc
Staff Emeritus
Science Advisor
19,026
2,406
Consider that the magnitude of average velocity (i.e. speed) can be taken as the quotient of distance travelled (orbital circumference) divided by the time (orbital period).
 
  • #4
26
0
But neither the radius or the diameter was was given :| i wa thinking along that line but we dont have that information. is there any other way or is that the only way?
 
  • #5
hage567
Homework Helper
1,509
2
In your question you wrote:

"Assume that the Earth's Orbit is a circle of radius 1.49*10^11m."

That's your distance between the sun and the earth.
 
  • #6
26
0
oooooh wow it was right infront of me thanx hage567
 

Related Threads on Forces & Fields HELP

  • Last Post
Replies
13
Views
10K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
2
Views
810
Replies
2
Views
3K
Replies
1
Views
3K
Replies
25
Views
3K
Replies
3
Views
1K
Replies
1
Views
2K
Replies
14
Views
432
Replies
1
Views
17K
Top