Exercise 1A boy with 81.6 kg weight walks up a plank BD (distance from B to D is 3m), whichrests on a ramp sloping at 300 to the horizontal. It rests on a frictionless roller supportat D.(i) Draw possible free body diagrams capturing the boy's weight when he is at B withexternal force, reaction forces at B and D, and friction at B.(ii) What is the value of the coefficient of static friction, if the plank does not slidedown the slope, when he is at Point B?(iii) Can the boy reach Point D? Why?3mB45°D300

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Answered: Exercise 1 A boy with 81.6 kg weight…

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