Work: A crane lifts a 425 kg steel beam vertically upward a distance of 95 m. How much work does the crane do on the beam if the beam accelerates upward at 1.8 m/s2? Neglect frictional forces.
A. 4.7 × 105 J
B. 2.7 × 105J
C. 3.2 × 105 J
D. 4.0 × 105 J
Answer: A
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