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A winch is used to elevate a 60 kg bale of hay into a barn loft that is 10 m off the ground. If it takes 5 seconds to elevate this bale of hay, how much power is generated by the winch? (PE or W = m x g x h) (P = W/t) (g= 9.8 m/s2)
Step 1: find PE or work ----
Step 2: find Power ----
How much work is done is the mass of the hay was 100 Kg and it was lifted 20 m off the ground? ----

Sagot :

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