Ocr physics text book question on gravitational field

Watch
unique_freak
Badges: 0
Rep:
?
#1
Report Thread starter 6 years ago
#1
How far above the surface of the earth is the gravitational field strength a)half b)1/4 of it's value at the surface? The radius of the earth is 6.4 x10^6 HELP PLEASE
0
reply
Joinedup
Badges: 20
Rep:
?
#2
Report 6 years ago
#2
(Original post by unique_freak)
How far above the surface of the earth is the gravitational field strength a)half b)1/4 of it's value at the surface? The radius of the earth is 6.4 x10^6 HELP PLEASE
You are interested in the distance from the Earth's center of gravity, for points on and above the surface, the field strength obeys the well known inverse square relationship.
0
reply
L'Evil Fish
Badges: 18
Rep:
?
#3
Report 6 years ago
#3
G IS PROP 1/r^2

g = k/r^2

You know surface g value and radius.

Find k.

Then you'll know which g values you want, and solve for r. Then subtract earth's radius cos you want height above earth
0
reply
unique_freak
Badges: 0
Rep:
?
#4
Report Thread starter 6 years ago
#4
(Original post by L'Evil Fish)
G IS PROP 1/r^2

g = k/r^2

You know surface g value and radius.

Find k.

Then you'll know which g values you want, and solve for r. Then subtract earth's radius cos you want height above earth
Thank uuuuuuuu!
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Do you have the space and resources you need to succeed in home learning?

Yes I have everything I need (288)
55.71%
I don't have everything I need (229)
44.29%

Watched Threads

View All
Latest
My Feed