Task 1: Three boxes are stacked on each other. The top box weighs 5 kg it is in the middle of 20 kg and the bottom box weighs 50 kg. Draw out all the forces that appear on the middle box Determine the size of the force 030416500 143383012065000143383024447500 71945516827500172593016827500 1433830317500143383012700000 Total force = force due to 5kg mass and 20kg mass F= mg = (5+20)9.81 =245.25 N Task 2: A trolley river Turbine type: Francis Fall height (m): 173 Water flow (m3 / s): 240 Waterfall’s shareholding: 100% F=mxa What is the total effect of the turbines on the waterworks if all current energy is converted into motion energy? F=ma 3600= kg.m/s/s a=9.81 3600=9.81 kg=366.972 Suppose the power plant is in continuous operation nine months a year Calculate the power plant's efficiency. 1Wh=3600 joules Energy for 9 months would be =3600x24x7x30 =18.4mega watt [...]
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