Question 3 of 8 (LO1-6 marks, LO2 – 10 marks; total for Question 3: 16 marks ) Consider a box of mass m = 40 lb on a horizontal plane at sea level: (a) Calculate the weight of the box (magnitude and direction) (b) Determine the normal reaction (magnitude and direction) (c) Assuming the coefficient of friction u = 0.4, for each of the following two applied forces determine whether the box moves or not; if it does move,calculate its acceleration: (i) F applied = 50 N (ii) F applied= 100 N

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