A crane lifts a 425kg steel beam vertically upward a distance of 117mHow much work does the crane do on the beam if the beam accelerates upward at 1.8m/s^2? Neglect frictional forcesa3.4 × 10^5J b5.8 × 10^5 J c4.0 × 10^5 J d4.9 × 10^5 J
The answer depends on beam weight (mg) and the vertical distance (h) lifted 117m Work mgh (425)(9.81)(117) _ J ANS Work is time IN-DEPENDENT so it doesn't matter how long it took to raise beam, thus its acceleration doesn't affect answer for workIT would however affect the POWER needed.
