例題 8Example 8

題目 Problem

Crank \(CB\) rotates about the horizontal axis with an angular velocity \(\omega_1 = 6\ \text{rad/s}\) which is constant for a short interval of motion which includes the position shown. The link \(AB\) has a ball-and-socket fitting on each end and connects crank \(DA\) with \(CB\). For the instant shown, determine the angular velocity \(\omega_2\) of crank \(DA\) and the angular velocity \(\omega_n\) of link \(AB\). Also determine the angular acceleration \(\alpha_2\) of crank \(DA\) and the angular acceleration \(\alpha_n\) of link \(AB\).