# Trigonometry

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How much work is done by raising a 117-lb box vertically 18.0 inches?
A. 5,190 ft-lb
B. 2,110 ft-lb
C. 25,300 ft-lb
D. 176 ft-lb

• Trigonometry -

work done = weight*vertical distance (upwards)
= 117 lbs *(18/12)'
= 175.5 ft-lb (in gravitational units)

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