14-17 Kinetics of a Particle: Work and Energy | Chapter 14: Hibbeler Dynamics | Engineers Academy

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Chapter 14: Kinetics of a Particle : Work and Energy
Hibbeler Dynamics 14th ed

14–17. If the cord is subjected to a constant force of F = 30 lb and the smooth 10-lb collar starts from rest at A, determine its speed when it passes point B. Neglect the size of pulley C.

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I think you're supposed to use the arc length formula and integrate three feet, the function describing the curve. You can't assume the length of the rope, I don't think?

rk