Holt Physics, Chapter 7

Tangential Speed - -describes the speed of an object in circular motion -depends on distance Uniform Circular Motion - -constant tangential speed Centripetal Acceleration - -the acceleration directed toward the center of a circular path -is due to a change in direction Equation for Centripetal Acceleration - centripetal acceleration = (tangential spead)^2 / radius of circular path Tangential Acceleration - -due to a change in speed Centripetal Force - -the net force on an object in uniform circular motion -is necessary for circular motion Equation for Centripetal Force - centripetal force = mass x [(tangential speed)^2 / radius of circular path] Inertia (Newton's 1st Law) - - the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction -is NOT a force Gravitational Force - -the mutual force of attraction between particles of matter -acts between all masses -depends on masses and the distance (Orbiting objects are in free-fall) Equation for Newton's Law of Universal Gravitation - gravitational force = constant x [(mass1)x(mass2) / (distance between masses)^2] Constant of Universal Gravitation - 6.673x10 ^ -11 Nxm^2/kg^2 Gravity - -is a field force - g= Fg/m -gravitational field strength = free-fall accleration (-9.81 m/s^2) -gravitational mass = inertial mass