Q1 (%40) The mechanism shown below is in a dynamic equilibrium condition with the
moment applied to link-2.
Draw individual free-body diagrams and determine the force F23 at point A. Assume
that the crank ( link-2) is balanced and frictions in the mechanisms are negligible.
$\theta_3$
A
2
$r_2$
$\theta_2$
$O_2, G_2$
3
C
$G_3$
3
$a = 0.06m, AO_2 = 0.1m, AB = 0.38m,$
$AC = 0.4m, AG_3 = 0.26m, \theta_2 = 337^\circ$
$\theta_3 = 120^\circ, \theta_c = 32^\circ, \alpha = 22^\circ, x = 0.30m,$
$\omega_2 = -18\hat{k} (rad/s) = constant, \alpha_2 = 77.3\hat{k} (rad/s^2)$
$\ddot{r} = -25.2\hat{i} (m/s^2), \ddot{r}_G4 = -14.7\hat{i} - 7.95\hat{j} (m/s^2)$
$m_3 = 7.4kg, m_4 = 2.5kg, I_G = 0.0136m^2kg,$
$r_{G_3/A} = 0.26\hat{i} - 0.005\hat{j} (m)$
$r_{C/A} = 0.395\hat{i} + 0.063\hat{j} (m)$
$r_{B/A} = 0.35\hat{i} - 0.148\hat{j} (m)$
