john walks four kilometers east, two kilometers south, three kilometers east amd two kilometers north as shown in the diagram. What is John's displacement

We found the centripetal acceleration of the earth as it revolves around the sun. compute the centripetal acceleration of a point on the surface of the earth at the equator caused by the rotation of the earth about its axis. (enter the magnitude. the radius of the earth is 6,371 km.)

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.