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## Main Question or Discussion Point

One reference frame A uses a force F on another reference frame B.

Both A and B counts the time it takes before A stops using the force F on B. They end up with different results.

Will B feel a different value of the force coming from A?

Will F*t be different in the two reference frames? (Where t is the time it takes before A stops using the force.)

Will B use the same force on A as the force A uses on B?

Both A and B counts the time it takes before A stops using the force F on B. They end up with different results.

Will B feel a different value of the force coming from A?

Will F*t be different in the two reference frames? (Where t is the time it takes before A stops using the force.)

Will B use the same force on A as the force A uses on B?