You carry a 7.0-kg bag of groceries above the ground at constant speed across a room. How much work do you do on the bag in the process?

A) 0.00 J
B) 82 J
C) 185 J
D) 157 J


A

Physics & Space Science

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A point charge Q is placed on the x axis at x = ?2.0 m. A second point charge, ?Q, is placed at x = 1.0 m. If Q = 60 ?C, what is the magnitude of the electrostatic force on a 40-?C charge placed at the origin?

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