Hibbeler 13-25

1. The problem statement, all variables and given/known data

Attached

2. Relevant equations

Attached

3. The attempt at a solution

2ac + 3 = 0 => ac = 1.5m/s^2 upwards

For FBD of C, Newton’s 2nd law

2T – 200g = 200*1.5 => T = 1131N

For FBD of the beam,

Take moments about A, and assume beam is rigid (CCW positive):

2.5T – 3T – 300*6*9.81*3 + Rb*6 = 0

RB = 8.92kN upwards

Ra + Rb + T – T – 300*9.81*6 = 0 => RA = 8.73kN

Is this correct? I don’t see why the solution is posting the velocity when asking for a reaction

Attached Images
File Type: png Hibbeler13-25.png (60.7 KB)

http://ift.tt/1kfK0pr

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