Answer:
Without viewing the specific figure, it's difficult to say definitively. However, a hockey puck sliding on ice could be represented by dots spaced evenly, a cyclist braking would have dots coming closer together, a sprinter starting a race would have dots starting close and getting farther apart, and a ball bouncing off a wall would show dots changing direction closely together.
Step-by-step explanation:
The motion diagram in figure 1.20 likely refers to a graphical representation of an object's position over time, with each dot representing the object's position at successive time intervals. Since we do not have the actual figure to view, we can look closer at the options provided to determine which motion could be described by a typical motion diagram:
A Hockey puck: If the motion diagram shows a constant speed with equal spacing between dots, this could represent a hockey puck sliding across smooth ice with minimal friction.
B cyclist braking to a stop: A motion diagram for this would show the dots getting progressively closer together as the cyclist slows down, indicating deceleration.
C a sprinter starting a race: This motion would probably begin with dots close together (as the sprinter accelerates from a stop) and then space out as they gain speed.
D a ball bouncing off the wall: This would show a rapid change in the direction of motion, with dots closely spaced before and after the impact with the wall, displaying an instantaneous reversal in horizontal velocity.
Without the figure, it's not possible to determine which exact motion is represented. But, based on the descriptions of each option, we can often infer the type of motion depicted in a motion diagram.