A person is sitting in a roller coaster. The person has a mass of 65 kg and the chair has a mass of 90 kg. What is the center of mass of the person/chair system if the center of mass of the chair is 0.4 m from the ground and the center of mass of the person is .7 m from the ground?

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

What effects result when there is an impact between earth and an asteroid? check all that apply. a. massive flooding. b. extinction of many life forms. c.major earthquakes change in average global temperature. d. giant dust cloud

The mantle is made up of which structural zones?