6) A 15 kg uniform ladder makes 60 degrees with the ground and a worker with 60 kg mass climbed to the top. The length of the ladder is 1.2 meters and it is uniform. The other end of the ladder is on a wall without friction. Draw the free body diagram show all the forces. What should be the minimum friction coefficient (mu) on the ground so that the ladder won’t slide. (Calculate the Normal force of the ground, Friction on the wall and the reaction force of the wall. Show work)
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