Unit 1 EMT 1200 2021.pdf - Adobe Acrobat Reader DC (32-bit) File Edit View Sign Window Help Home Tools Unit 1 EMT 1200 2... X . 1 / 2 135% BAGO EL & Ruel Alleyne z z (b) If z = x4 + 2x2y + y3 and x = rcos and y = rsin, find and in their simplest ar ae forms. (4 marks) Question 2 (a) The deflection y at the centre of a rod is known to be given by y kw12 d4 where k is a constant. If w increases by 2 percent, 1 by 3 percent and d decreases by 1 percent, find the percent increase in y. (5 marks) (b) If z = (x2 - y2)1/2 and x is increasing at 3.5m/s, determine at what rate y must change in order that z shall be neither increasing nor decreasing at the instant when x = 5m and (5 marks) (x+y-1) (c) Find the stationary points of the function z = and determine their nature. (x2+2y2 +2) (10 marks) y = 3m. O Type here to search gi E 94% AJ ) 10:55 AM 7/16/2021