Using a dot product, calculate the work done in the given situation.A 165-pound person climbs 5 steps up a ladder that has rungs spaced at one-foot intervals. The ladder is inclined at an angle of 74° relative to the ground.
A. 793 ft-lb
B. 825 ft-lb
C. 227.4 ft-lb
D. No work is done
Answer: A
Mathematics
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