Choose the appropriate word choices below that correctly complete the blanks in the following three sentences: left: at the beginning, the object is at the origin and the object is moving to the slowing down: at first, the object is positive: due to a acceleration. right: in the second part of the motion, the object is moving to the speeding up: and /left-speeding up/slowing down/staying the same-positive/negative/zero-right/l eft-speeding up/slowing down/staying the same