Using a forked rod, a 0.7-kg smooth peg P is forced to move along the vertical slotted path r = (0.5 0) m, where 0 is in radians. The angular

position of the arm is 0 = (n/8 t^2) rad where t is in seconds. The peg is in contact with only one edge of the rod and slot at any instant. (Figure 1)