Hey! please can you explain how i do this (not the answer, just an example of how i could fnd the answer to this question):: Q) A crane can lift a 500kg mass (not weight) to a height of 30m in 15s. How much power would the crane have? a. 1000 W b. 2450 W c. 51 W d. 9800 W I'm guessing it would be 51W but not sure since we havent had any practice @ class.... Thanks everyone!