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Question:

I am totally lost in this questionplease help? Thank you very very much!?

I am totally lost in this questionplease help? Thank you very very much!?

Answer:

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.

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