Question

An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity? If yes, state the conditions that must be placed on the magnitude and direction of the velocity. If no, provide a reason.




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Answer 1

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Yes.

1. Even when an object experiences a net zero external unbalanced force, it is possible that the object is travelling with a non-zero velocity.
2. This is possible only when the object has been moving with a constant velocity in a particular direction.
3. Then, there is no net unbalanced force applied on the body.
4. The object will keep moving with a non-zero velocity.
5. To change the state of motion, a net non-zero external unbalanced force must be applied on the object.

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Answer 2

Explanation:

While different numbers abound, it's generally accepted that we have three different types of teeth: Incisors, canines, and molars. Yet, many will happily distinguish between the three different types of molars, including premolars and third molars.