MAC 2311 Midterm: MAC2311 F93 Test 1
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Instructions: do not write your answers on this paper, use separate answer sheets. (1) generally, the more fertilizer that is used, the better the yield of the crop. However, if too much fertilizer is applied, the crops become poisoned and the yield goes down rapidly. Sketch a possible graph showing the yield of the crop as a function of the amount of fertilizer applied. (2) a body of mass m is falling downwards with velocity v. newton"s second. Law of motion, f = ma, says that the net downward force, f , on the body is proportional to its downward acceleration, a. The net force, f consists of the force due to gravity, fg, which acts downwards, minus the air resistance, fr, which acts upwards. The force due to gravity is mg, where g is a constant. Sketch a graph of v against time t. (3) figure 3 shows the graph of y = f (x).
