Chapter 5 Friction Force on a Dancer on a Drawbridge 9 of 15> Part B Constants A

Question

Chapter 5 Friction Force on a Dancer on a Drawbridge 9 of 15> Part B Constants A dancer is standing on one leg on a drawbridge that is about to open. The coefficients of static and kinetic friction between the drawbridge and the dancer's foot are (Figure 2)The drawbridge then starts to rise. The dancer continues to stand on one leg. The drawbridge stops just at the point where the dancer is on the verge of slipping. What is the magnitude f of the frictional force now? Express your answer in terms of some or all of the variables n, p, , and/orm. The angle should not appear in your answer and fik» respectively, n represents the normal force exerted on the dancer by the bridge, and g represents the gravitational force exerted on the dancer, as shown in the drawing.(Figure 1) For all the questions, we can assume that the bridge is a perfectly flat surface and lacks the curvature characteristic of most bridges. View Available Hint(s) 02 Submit Previous Answers igure X Incorrect: Try Again; 5 attempts remaining The correct answer does not depend on: MsFg. ms Part C Then, because the bridge is old and poorly designed, it falls a little bit and then jerks. This causes the dancer to slide down the bridge. What is the magnitude fof the frictional force now? Express your answer in terms of some or all of the variables n,, , and/or A. The angle should not appear in your answer

Explanation / Answer

B) dancer stands on one leg. so static friction is exists , so

frictional force  f = ns

C) in this case dancer to slide down the bridge. so kinetic friction is exists

frictional force f = nk

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