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If you take the question at face value- so A and B are everyday objects (cellphone, brick, bust of Heisenberg in bronze, etc), and they are thrown by a human rather than some device that takes them to near light speed, then the answer is that B experiences the electromagnetic force during the collision. Although you state that the objects carry no net charge,...


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To move an object you must apply a force where $F = m\vec a\ and\ \vec a = d\vec v/dt$. To move it instantaneously implies that dt --> 0 and the force would go to infinity. Hence instantaneous acceleration or deceleration is impossible. A non-accelerating object can only move with constant velocity in a perfectly straight line. Any curve in the line implies ...


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The problem is a common conflation of 1st and 3rd law forces. Yes, the normal force (from the floor up) and the contact force (from the ball down) are equal and opposite since they are 3rd law forces. However, to understand why the ball's motion changes we must focus on external first law forces. If the the normal force up exceeds the downward forces of ...


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Explain why you are accelerating and yet going the same speed. Acceleration occurs if there is a change in speed, or if there is a change in direction. While your car's speed doesn't change, its direction does. So it experiences an acceleration. It all has to do with Newton's first law. The law basically says a body moving in a straight line at constant ...


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