Help pleaase physics?
A carpenter carries his toolbox 8 kg at constant speed up two floors of 3 m high, in one minute. a) the amount of work he has done on the Toolbox to 2 flights? b) how the potential energy variation the toolbox? What was the wattage when he wore the toolbox up the 2 flights? d) if, in leaning over the railing, the carpenter glasses fall, what will be the speed of glasses just before they reach the landing of a flight down? Can you tell me what means you used formulas for answers. Thank you sooo much
mass = kg ht = 2x3 = 6 8 M time, t = 1 min = 60 seconds, taking 10 g = F xd = work = h = mg = 8x10x6 Changes in 480 J = mgh PE = 480J power = work / time = 480/60 = 4W = ht freefall 3M = s, u = 0 v ^ 2 = u ^ 2 +2 gs v ^ 2 = 0 + 2 x 10 x 3 = 60 = v sqrt (60) = 7.75 seconds
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