(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Newton’s law of gravitation states that the force between two masses m1

and m2 at a distance r apart is F = Gm1m2/r2 .

(a) Find the magnitude of the gravitational force exerted by a solid hemisphere

of radius a and constant density on a point mass located at

the center of the base of the hemisphere.

(b) A particle of mass m is placed at the center of one base of a circular

cylindrical shell of inner radius r1, outer radius r2, height h, and

constant density . Find the force of gravitational attraction exerted

by the cylinder on the particle.

3. The attempt at a solution

because the only force which would act on the bottom center of the hemisphere is pointed straight down. the force would be represented in a negative direction (-x/||x||). therefore f(x)=-mMGx/||x3||. ||x||=sqrt(x2+y2+z2).

because the force is coming only from the z direction F(x,y,z)=-mMGz/((z2)to the 3/2power)

is there someone to conform that.

and please lead me to the b part

thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Conform/help with calc solution

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**