(Solved): The robot arm is elevating and extending simultaneously. At a given instant, =21,=38deg/s, ...

The robot arm is elevating and extending simultaneously. At a given instant, $?=21^{?},\stackrel{?}{?}=38\mathrm{deg}/\mathrm{s},\ddot{?}=124\mathrm{deg}/{\mathrm{s}}^2,l=0.35$ $\mathrm{m},\stackrel{?}{l}=0.44\mathrm{m}/\mathrm{s}$, and $\ddot{l}=?0.20\mathrm{m}/{\mathrm{s}}^2$. Compute the radial and transverse forces $F_r$ and $F_{?}$ that the arm must exert on the gripped part $P$, which has a mass of $m=18.8\mathrm{kg}$. Compare with the case of static equilibrium in the same position. Assume $d=0.54\mathrm{m}$. Answers: Dynamic: $F_r=$ $\mathrm{N},{\mathrm{F}}_{?}=$ $\mathrm{N}$ Static: $F_r=$ $\mathrm{N},{\mathrm{F}}_{?}=$ N