Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position...

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Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application of the force. The magnitude of the torque exerted by the force F is given by rFcos Units: Newton-meter (Nm)

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Transcript of Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position...

Page 1: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.

Torque and Static Equilibrium

Torque:

Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application of the force. The magnitude of the torque exerted by the force F is given by

rFcosUnits: Newton-meter (Nm)

Page 2: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.

Torque is a vector. So we need a way to determine the direction of the torque.

1. Point your fingers in the direction of r.

2. Curl your fingers in the direction of F.

3. Your thumb will point in the direction of the torque.

Right-hand Rule

Page 3: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.
Page 4: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.

Static Equilibrium

There are two conditions for static equilibrium:

1. The net external force must be zero

1. The net external torque must be zero

Page 5: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.
Page 6: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.
Page 7: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.
Page 8: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.
Page 9: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.
Page 10: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.
Page 11: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.
Page 12: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.
Page 13: Torque and Static Equilibrium Torque: Let F be a force acting on an object, and let r be a position vector from a chosen point O to the point of application.

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