12-215. The roller at A is moving upward with a velocity
Chapter 12, Problem 12-215(choose chapter or problem)
The roller at A is moving upward with a velocity of \(v_A=3 \mathrm{ft} / \mathrm{s}\) and has an acceleration of \(a_A=4 \mathrm{ft} / \mathrm{s}^2\) when \(s_A=4 \mathrm{ft}\). Determine the velocity and acceleration of block B at this instant.
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