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QUESTION 5 [4 marks for (a) and (c); 2 marks for (b)] (a) Consider a block of weight W resting on a board of variable inclination angle e. Draw the free body diagram for the block under the following different conditions, also including the horizontal and vertical components of the force vectors and the relationship between the angle of inclination and angle of static friction: i no friction, ii no motion, motion impending, and iv. motion. (b) Determine whether the block shown below, of weight 50 N, will slide if it lies on a slope with an incline of 60 and a force of 25 N is acting on the block. μ.-0.2 and μ,-0.15. 50 N 25 N 60% (c) A hawser thrown from a ship to a pier is wrapped two full turns around a bollard. The tension in the hawser is 10 kN; by exerting a force of 225N on its free end a dockworker can just keep the hawser from slipping. Determine the coefficient of friction between the hawser and the bollard. If the hawser were wrapped four full turns around the bollard, what level of tension would be resisted by the dockworker's 225 N force.

Answer 1

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> 乂 艮くベ 1
please post others questions individually