Question
In a bench press, a weight lifter presses a $105-\mathrm{kg}$ barbell $0.485 \mathrm{~m}$ straight up. If the barbell starts and ends at rest, how much work did the weight lifter do?
Step 1
The formula is given by: \[ W = -mgd \] where: \( W \) is the work done, \( m \) is the mass of the object, \( g \) is the acceleration due to gravity, and \( d \) is the displacement of the object. Show more…
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