# Thread: What is the minimum pulling force that the clown must exert to yank his feet out from under himself?

1. ## What is the minimum pulling force that the clown must exert to yank his feet out from under himself? var addthis_config = {"data_track_clickback":false};

7.) A circus clown who weighs 905 N. The coefficient of static friction between the clown's feet and the ground is 0.52. He pulls vertically downward on a rope that passes around three pulleys and is tied around his feet. What is the minimum pulling force that the clown must exert to yank his feet out from under himself?

2. That depends on the angle at which he is standing and the angle of the final section of rope (the section tied to his feet).

If he and the rope are perfectly vertical even as he pulls, his legs will never slid out from under him - he'll just rise vertically.

Oerhaps there was a diagram you failed to include?

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