PHYS 1500 Lecture Notes - Lecture 11: Centripetal Force
Document Summary
Ball being swung in a circle on a string tension. A planet orbiting a star in a uniform circular orbit. Two particles with mass m1 and m2 are separated by distance r, the gravitational force acts along a line joining them with magnitude given by: G is a very small constant due to the face that gravity is the weakest force. Force that m1 exerts on m2 is equal and opposite to the force m2 exerts on m1. Size of object does not matter as long as it is on outside of object. The gravitational force exerted by a uniform sphere on a particle outside the sphere is the same as the force exerted if the entire mass of the sphere were concentrated on its center. The escape speed is the speed needed for an object to soar off into space and not return: for the earth, vesc is about 11. 2 km/s. V is independent of mass of the object.
