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OpenStudy (anonymous):
Dynamics simple conceptual problem.
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OpenStudy (anonymous):
I do not see how the pipe applies a normal force when the ball is on the left!
OpenStudy (anonymous):
The normal force is the force that the surface exerts that points perpendicularly away from the surface itself. Do you agree that the direction of the ball's motion is constantly changing? If so, then there needs to be a force on it - which is just the normal force exerted by the pipe.
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