Meriam, Kraige & Bolton — Kinetics of Particles: Problem 3_66

3/66 The robot arm is elevating and extending simultaneously. At a given instant, \(\theta = 30^\circ\), \(\dot{\theta} = 40 \text{ deg/s}\), \(\ddot{\theta} = 120 \text{ deg/s}^2\), \(l = 0.5 \text{ m}\), \(\dot{l} = 0.4 \text{ m/s}\), and \(\ddot{l} = -0.3 \text{ m/s}^2\). Compute the radial and transverse forces \(F_r\) and \(F_\theta\) that the arm must exert on the gripped part \(P\), which has a mass of 1.2 kg. Compare with the case of static equilibrium in the same position.