Question

If the sum of both the external torques and the external forces on an object is zero, then the object must be at rest. True or False

Answer 1

Answer:

False

Explanation:

The object could be in a constant velocity and the sum of both the external torques and the external forces on an object is zero. Newton's first law states that when the total net force is 0 or there is zero force, the object could be at rest OR remain in constant velocity. It's not necessary at rest.

Answer 2

If the sum of both the external torques and the external forces on an object is zero, then the object must be at rest - False.

The external torques are a product of an external force with an external moment arm.

• It is the force that responsible for the movement of an object around its axis or angular movement.
• External forces include the applied force, tension force, friction force, and air resistance force
• External forces are caused by an external agent.
• If  the sum of both the external torques and the external forces on an object is zero then the object is in transition equilibrium which means if it is at rest it will remain the same or if it is in motion it will constantly move

Thus, If the sum of both the external torques and the external forces on an object is zero, then the object must be at rest - False.

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