Log in
Physics
4
answers
1
watching
452
views

A small sphere X of mass M is placed a distance d from a point mass. The gravitational force on sphere X is 90 N. Sphere X is removed and a second sphere Y of mass 4M is placed a distance 3d from the same point mass. What is the gravitational force on sphere Y?

Watch
4
answers
1
watching
452
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Avatar image
Read by 2 people
Already have an account? Log in
Share
Avatar image
Read by 2 people
Already have an account? Log in
Share
Avatar image
Read by 2 people
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

The gravitational force on a body located a distance R from the center of a uniform spherical mass is due solely to the mass lying at distance r <= R, measured from the center of the sphere. This mass exerts a force as if it were a point mass at the origin. Use the above result to show that if you drill a hole through the earth and then fall, you will execute simple harmonic motion about the earth's center. Find the time it takes you to return to your point of departure and show that this is the time needed for a satellite to circle the Earth in a low orbit, r = R_Earth. In deriving this result, you need to treat the Earth as a uniformly dense sphere, and you must neglect all friction and any effects due to the Earth's rotation.

A mass m is positioned relative to three other masses, as shownbelow.


A mass 5M is a shell of radius R. A mass 3M is a uniform spherewith radius R/2. A mass M is a uniform sphere with radius R/4. Whatis the net gravitational force on m due to these three masses interms of GmM/R2?
Express your answer in components (x is horizontal, y is verticalon the screen).

Fx = ......GMm/R2
Fy = ....... GMm/R2

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.80 m. Two of the spheres have a mass of 2.10 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that the spheres exert on each other, what is the magnitude of the initial acceleration of the third sphere?

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in