Solve the following problems, show your work for full mark: [T, A][40 marks If needed assume g = 9.8 [m/s]]; G = 6.67 x 10-11 . m3 [kgs2] ; PE = mgh; KE = - mv?; W = AKE Power = energy time ; W = F.Ad. cose; Efficiency = =out x 100%; Top = 1.8 x Toc + 32; Tk = Toc + 273; Ein Q1: You walk up the stairs to the 10th floor. There are 120 steps and each step are about 25 cm high. Calculate the work done by force of gravity as you walk up to the 10th floor? Is this work positive or negative? Explain your estimate. [8 points] Show all your work