A crane is lifting a mass of 1235 kg directly upward with negligible frictionIf it takes 14 seconds to lift the mass 34 meters, and the engines power output is 4500 watts, what is the work done by the crane? Use energy calculations and the equation P(watts) ?W / ?t.
the force is 1235kg x g , using 9.8 for g we get 12103N: The work is: 12103N x 34m 411.5kJ, since this happend in 14 seconds the power about 29kW, If the engines power output is only 4.5kW then I used the wrong value for g, Is this crane on the moon? the numbers just about work for the moon.
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Well, the salad is quite obviously better nutrient wiseI'd dare say, calorie wise, too because it's not lean ground beef, it's fried, the buns have grease on them and ketchup has caloriesThen you're dealing with the fat and calorie content of the sour cream on the baked potatoA healthier option would be to go ahead and get a grilled chicken sandwhich from Wendy's with a side salad and lowfat dressingDrink water, like you said and that would most likely be your best betWendy's makes really good side salads, for what it's worth.
