Motion question 1 options: a change in speed over a certain amount of time. a change in direction. a change in position over a certain amount of time. a reference point. which is an example of translational motion? question 2 options: a child plays on a merry-go-round. the dog ran from the tree to the swing set. a girl eats a sandwich. molecules in a block of wood vibrate. which answer is a scientifically accurate description of velocity? question 3 options: the motorcyclist traveled along a highway at 55 mph. walking south along the two-mile canyon trail generally takes less time than traveling the same trail north because walking south is all downhill. the car traveled 70 mph north to atlanta on interstate 75. the hiker began hiking the park's five-mile north hiking trail at 8: 00 a. m. with plenty of daylight left to complete the hike before dark.