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A crate sits on a platform supported by links AB and CD. The combined mass of th

ID: 1850714 • Letter: A

Question

A crate sits on a platform supported by links AB and CD. The combined mass of the crate and the platform is 20 kg and point G is their center of mass. The links have negligible mass. At the instant shown torque M is being applied to link AB to give the links angular velocity ? = 4 rad/s counterclockwise and angular acceleration ? = 12 rad/s^2 counterclockwise. Find the torque M needed. Find the reaction force on the platform at B. Find the force in link CD.

The answers are 60 N-m of torque counterclockwise. The answer for the reaction at B is 120 N to the left and 108.35 N up. The answer given for the force in link CD is 72.15 N in tension. Thanks in advance!

A crate sits on a platform supported by links AB and CD. The combined mass of the crate and the platform is 20 kg and point G is their center of mass. The links have negligible mass. At the instant shown torque M is being applied to link AB to give the links angular velocity ? = 4 rad/s counterclockwise and angular acceleration ? = 12 rad/s^2 counterclockwise. Find the torque M needed. Find the reaction force on the platform at B. Find the force in link CD. The answers are 60 N-m of torque counterclockwise. The answer for the reaction at B is 120 N to the left and 108.35 N up. The answer given for the force in link CD is 72.15 N in tension. Thanks in advance!

Explanation / Answer

USE summation of all forces = 0 considering each fbd...u ll get ur answer for all.

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