Force I: Newton's Second Law in Inertial & Accel. Frames

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In Newton's second law, the equation F=m*a applies consistently in inertial frames, while pseudo-forces arise only in non-inertial frames. Real forces remain unchanged across different frames, similar to how temperature is consistent regardless of the observer's position. When observing a ping pong game from a NASA centrifuge, the perception of the game differs depending on whether one is in an inertial or non-inertial frame. The dynamics of the game will appear altered due to the effects of the centrifuge's acceleration. Understanding the distinction between real forces and pseudo-forces is crucial in analyzing motion across various frames.
Steven Wang
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I have a problem, in Newton's second law F=m*a in inertial frame. In the accelerated frame a mass should be affected by a inertial force, but the force in the original inertial frame don't change, so real force is just like the temperature and will be the same in different frames?
 
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Yes, the real forces are the same in any frame. But inertial pseudo-forces only appear when viewing motion from a non-inertial frame.
 
Thank you !
 
Doc Al said:
Yes, the real forces are the same in any frame. But inertial pseudo-forces only appear when viewing motion from a non-inertial frame.
If I were in a NASA centrifuge and viewing a ping pong game in the Earth's inertial frame (neglecting coreolis forces), would the game look the same if I were in an inertial frame, and the game were being played in the centrifuge?
 

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