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Newton's First Law of Forces states a lot of things. One of these things are,

if an object is in motion, its net-force can not be zero.

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Hogwash ! Not only did Newton never make such a statement, it's not even true.

When the net force on an object is zero, it continues in constant uniform motion,

meaning constant speed in a straight line. If a net force is applied, then the speed

or the direction of the object's motion can change ... called "acceleration".

When an object is in motion, its momentum and kinetic energy are not zero.

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