d$.$ Repeat parts $($a$),($b$),$ and $($c$)$ when the velocity input is replaced by a force falt$)$ applied at point A$,$ with the positive sense to the right. Explain why the expression for t differs from the answer to part $($b$).$ C$.==01$ B$3$ valt$)$ B $$ B$2$ M O $$ VI Figure P$7\mathrm{.}6$