In this section you will:. Draw motion diagrams to describe motion. Develop a particle model to represent a moving object. Section 2.1-1. All Kinds of Motion.
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Perceiving motion is instinctive—your eyes pay more attention to moving objects than to stationary ones. Movement is all around you.
Movement travels in many directions, such as the straight-line path of a bowling ball in a lane’s gutter, the curved path of a tether ball, the spiral of a falling kite, and the swirls of water circling a drain.Section 2.1-2
Answer: Keeping track of the motion of the runner is easier if we disregard the movements of the arms and the legs, and instead concentrate on a single point at the center of the body. In effect, we can disregard the fact that the runner has some size and imagine that the runner is a very small object located precisely at that central point. A particle model is a simplified version of a motion diagram in which the object in motion is replaced by a series of single points.Section 2.1-8
Which statement describes best the motion diagram of an object in motion?
A. a graph of the time data on a horizontal axis and the position on a vertical axis
B. a series of images showing the positions of a moving object at equal time intervals
C. a diagram in which the object in motion is replaced by a series of single points
D. a diagram that tells us the location of the zero point of the object in motion and the direction in which the object is movingSection 2.1-9
What is the purpose of drawing a motion diagram or a particle model?
A. to calculate the speed of the object in motion
B. to calculate the distance covered by the object in a particular time
C. to check whether an object is in motion
D. to calculate the instantaneous velocity of the object in motionSection 2.1-11