Question

You want to use a rope to pull a heavy safe across the floor. The rope...

You want to use a rope to pull a heavy safe across the floor. The rope will break if the tension exceeds 1800N. what is the weight of the heaviest safe you can pull if the static friction coefficient between the safe and the floor is us = 0.4 and the rope is not necessarily horizontal?

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Homework Answers

Answer #1
  • Draw free body diagram to the block
  • Resolve forces in x and y direction
  • Apply constrain to equation
  • Get equation in terms T and other variable ( angle)
  • Differentiate the denominator term in order to maximize tension

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