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SAT® Subject Test in Physics

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Moderate

Builder at Work

SATPHY-C9XKYE

As a builder lifts a $3.0\, kg$ brick at a steady speed from the ground to a platform 2.0 meters high.

How much work is done on the brick by the builder and by the earth while it is being lifted, and what is the net work done on the brick by all forces while it is being lifted?

A
Work Done by Builder Work Done by Earth Net Work
$60\, \text{Joules}$ $-60\, \text{Joules}$ $0\, \text{Joules}$
B
Work Done by Builder Work Done by Earth Net Work
$-60\, \text{Joules}$ $60\, \text{Joules}$ $0\, \text{Joules}$
C
Work Done by Builder Work Done by Earth Net Work
$60\, \text{Joules}$ $0\, \text{Joules}$ $60\, \text{Joules}$
D
Work Done by Builder Work Done by Earth Net Work
$-60\, \text{Joules}$ $0\, \text{Joules}$ $-60\, \text{Joules}$
E
Work Done by Builder Work Done by Earth Net Work
$60\, \text{Joules}$ $60\, \text{Joules}$ $120\, \text{Joules}$