How is the motion of an object affected when a force acts on it?

Newton's first law of motion is sometimes called the law of inertia. When the forces acting on an object are balanced, the object is either at rest or moving with a constant velocity. Unbalanced forces can cause an object to accelerate or decelerate. Unbalanced forces can also cause an object to change direction.

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since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

truck y has a greater velocity than truck x.