Problem 13-89 Dynamics Hibbeler 13th (Chapter 13) Engineering Dynamics

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Equations of motion: Cylindrical Coordinates

Rod OA rotates counterclockwise with a constant angular velocity of theta dot = 5 rad/s. The double collar B is pin-connected together such that one collar slides over the rotating rod and the other slides over the horizontal curved rod, of which the shape is described by the equation r = 1.5(2-cos(theta)) ft. If both collars weigh 0.75 lb, determine the normal force which the curved rod exerts on one collar at the instant theta = 120 degrees, neglect friction.
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Комментарии
Автор

awesome, did you not forget to include the component of the weight in the r-direction when resolving?

happysquirrelwhats-tube
Автор

I just don't understand when he says in the problem that "both collar weigh 0.75 lb". Is he saying the total weigh of the collars is 0.75 lb or each one weights 0.75 lb?

antoniotonisi
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maybe you forget the gravity component?

rayFENG