Register to reply

Gravity on mass on earth's surface vs sun-earth gravity

by ninjagowoowoo
Tags: earth, gravity, mass, sunearth, surface
Share this thread:
Apr27-05, 11:39 PM
P: 75
A mass of 5.000 kg is sitting on the Earth's surface directly under the sun during a solar eclipse. The sun exerts a gravitational force with magnitude Fs on the mass. The moon's gravitational force on the mass has magnitude Fm. Calculate the ratio Fs / Fm.

This problem is really frustrating me. For the object, wouldnt Fm be mg = 5*9.8?

Then wouldnt the Fs be (mass of the sun)(mass of earth)/R^2 ?

So wouldnt it be the Fs divided by Fm? Please help!?!?!
Phys.Org News Partner Science news on
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
Apr27-05, 11:47 PM
Sci Advisor
HW Helper
P: 3,031
You are being asked to calculate the ratio of the forces of attraction to the sun and to the moon for a mass that is at the surface of the earth. You are not asked for the force of attraction to the earth.
Apr27-05, 11:50 PM
P: 75
HAH wow i'm embarassed... thanks

Register to reply

Related Discussions
Gravity: Point where Earth's Gravity and the Moon's cancel each other out? Advanced Physics Homework 21
Gravity on the surface of a Hollow Earth General Physics 14
Problems - Gravity & Mass of Earth & Moon Introductory Physics Homework 4
Is a change in earth's surface gravity detectable? Special & General Relativity 9