You are in a ‘rotor’ ride at the amusement park. You enter a cylindrical room of radius R and place yourself by the wall. The rotor starts spinning pushing you against the wall. Then, the floor is removed. If your coefficient of static friction is , find the minimum speed of rotation for the cylinder so as to keep you stuck to the wall without your feet touching the floor.

Less force and energy was applied

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

A., d., and f i think