7. Katie exerts a 500 N upward force on a 800 N barbell that is resting on the floor. The barbell does not move. How large is the normal contact force exerted by the floor on the barbell?

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7. Katie exerts a 500 N upward force on a 800 N barbell
that is resting on the floor. The barbell does not move.
How large is the normal contact force exerted by the
floor on the barbell?
Transcribed Image Text:7. Katie exerts a 500 N upward force on a 800 N barbell that is resting on the floor. The barbell does not move. How large is the normal contact force exerted by the floor on the barbell?
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