Question

i will ask your help again,,!! thanks >>>>>>A worker wishes to pile a cone of sand onto a circular area in his yard. The radius of the circle is
R, and no sand is to spill into the surrounding area. If µs
is the static coefficient of friction between
each layer of sand along the slope and the sand beneath it (along which it might slip), show that
the greatest volume of sand that can be stored in this manner is π µs R3
/3. (The volume of a cone
is Ah/3, where A is the base area and h is the cone’s height).

Answer 1

http://physics.ucf.edu/~roldan/classes/phy2048-ch6.pdf
you can see page number 4 for help ...

Answer 2

thank you

Answer 3

you're welcome