Please explain, I really don't understand.1) A crane lifts a 3.50 x 10^3 -N bucket containing 1.15 m^3 of soil (density 2.00 x 10^3 kg/m^3) to a height of 7.50 mCalculate the work the crane performsDisregard the weight of the cable.AND 2) A 12.0-m-long conveyor belt, inclined at 30 degrees is used to transport bundles of newspapers from the mailroom up to the cargo bay to be loaded on to delivery trucksEach newspaper has a mass of 1.0 kg, and there are 25 newspapers per bundleDetermine the power of the conveyor if it delivers 15 bundles per minute.
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A crane lifts a 3.50 x 10^3 -N bucket containing 1.15 m^3 of soil (density 2.00 x 10^3 kg/m^3) to a height of 7.50 mCalculate the work the crane performsDisregard the weight of the cable Crane work weight to be lifted 7.50 m Weight to be lifted 3,500 + 1.5(2000)(9.8) 32,900 N Therefore, Crane work 32,900 7.5 246,750 joules A 12.0-m-long conveyor belt, inclined at 30 degrees is used to transport bundles of newspapers from the mailroom up to the cargo bay to be loaded on to delivery trucksEach newspaper has a mass of 1.0 kg, and there are 25 newspapers per bundleDetermine the power of the conveyor if it delivers 15 bundles per minutePower Work/Time Work change in potential energy of newspaper bundles Work mgh where m mass of the newspaper bundles 1 25 15 375 kgg acceleration due to gravity 9.8 m/sec^2 (constant) h vertical height at which bundles are taken to 12(sin 30) 6 meters Time 1 minute Therefore, substituting values, Power 375 9.8 6/1 Power 22,050 joules/min 367.50 watts Hope this helps.
