Question

Criticize the following incorrect statement:

 

“If an object is at rest and the total force on it is zero, it stays at rest. There can also be cases where an object is moving and keeps on moving without having any total force on it, but that can only happen when there’s no friction, like in outer space.”

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Answer #1

There is nothing wrong in this statement.

according to newton first law of motion,

a body is in motion or rest tends to be in motion or rest unless an external force is applied.

So, like in vacuum , if body is in rest , it will remain in rest if force is not applied.

Same applied for body in motion, it will remain in motion if force is not applied

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