上海文通大粤 SHANGHAI JIAO TONG UNIVERSITY Type of Rigid-Body Plane Motion Example all points in the body (a) move in parallel straight Rectilinear translation lines B Rocket test sled all points move on (b) Curvilinear congruent curves translation B Parallel-link swinging plate all particles in a rigid (c) body move in circular Fixed-axis rotation paths about the axis or rotation Compound pendulum (d) General plane motion B B Connecting rod in a reciprocating engineall p y oints in the bod y move in parallel straight lines all points move on all points move on congruent curves all particles in a rigid bod y move in circular paths about the axis or rotation