the angular speed is zero. the angular speed is constant.

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Presentation transcript:

the angular speed is zero. the angular speed is constant. Run the animation in the original configuration and observe the two boxes for angular speed. This experiment shows that when there is a net torque on an object free to rotate about a fixed axis: the angular speed is zero. the angular speed is constant. there is an angular acceleration. no general conclusions are possible from the scenario. Click here to play animation

maximum; antiparallel minimum; parallel zero; zero maximum; maximum Place the two points in arbitrary positions and orient the forces so that one points toward the pivot point and one points away from the pivot point. This produces a _____ torque because the lever arms are _____. maximum; antiparallel minimum; parallel zero; zero maximum; maximum Click here to play animation

Assume the values of the forces are fixed Assume the values of the forces are fixed. Place the points of application in arbitrary positions and then keep them fixed. To achieve maximum torque, the forces must be directed: so that the moment arms go through the points of application and produce rotation in the same direction. so that they both point toward the pivot point. so that they both point away from the pivot point. so that they are perpendicular to their moment arms. Click here to play animation