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7 December, 02:09

A worker pulls horizontally on a crate across a rough horizontal surface, causing it to move forward with constant velocity. Force A is the force exerted by the worker and force B is the force of friction due to the surface. What is the relationship between A and B?

A > B

A = B

A< B

It will not slow down, but continue moving at constant velocity.

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  1. 7 December, 02:34
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    If an object is moving at a constant velocity (That means a constant speed in a straight line.) the net force acting on the object is zero, nothing. Why? It's motion is described by Newton's first law: An object at rest will remain at rest and an object in motion will remain in motion moving at constant velocity unless acted by an outside force.
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