(i) Handle bar or seat because handle or seat is moving along a straight road, not rolling.
(ii) Pedal because it is rolling around a fixed centre by the foot.
(iii) Wheel because it is rolling and also moving along a straight road.
(i) Handle bar or seat because handle or seat is moving along a straight road, not rolling.
(ii) Pedal because it is rolling around a fixed centre by the foot.
(iii) Wheel because it is rolling and also moving along a straight road.