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Transcript
Inclined Planes and Net Force Renate Fiora How do we figure out net force? • Similar to any other time, when an object is on an inclined plane, we must combine all the forces acting on it to find the resulting net force. • There are three general cases we encounter: – When the object is at rest. – When the object is moving at a constant velocity. – When the object is accelerating. Object at Rest Free-body diagram Situation Diagram +y / FN FN Fnet = 0 Ff Ff +x / FW FW Object at Constant Velocity Situation Diagram +y / Free-body diagram FN FN Ff FA Fnet = 0 Ff FA +x / FW FW The applied force is in green to show that it may not be present in all situations. It may only be the parallel component of the object’s weight accelerating it. The object does not necessarily have to moving in one direction or another, but the directions of the force vectors will change accordingly. Object Accelerating Situation Diagram +y / Free-body diagram FN FN Fnet Ff FA Ff FA +x / FW FW The applied force is in green to show that it may not be present in all situations. It may only be the parallel component of the object’s weight accelerating it. The object does not necessarily have to moving in one direction or another, but the directions of the force vectors will change accordingly.
