The following is a graph of the position of a student in front of a motion detec

ID: 2163913 • Letter: T

Question

The following is a graph of the position of a student in front of a motion detector with respect to time.

The motion detector is located at a position marked -5 m.

1. According to the above graph, which of the following does correctly describe the motion in the time interval between 4 s and 5 s?

a. The student is approaching the motion detector at an decreasing speed with respect to time.

b. The student is approaching the motion detector at an increasing speed with respect to time.

c. The speed of the student is highest in this time interval.

d. The student moves away from the motion detector.

2. According to the above graph, what is the acceleration at time t = 8 s?

a. cannot tell from the graph.

b. 1 m/s

c. 0 m/s2

d. -1 m/s2

a. The student is approaching the motion detector at an decreasing speed with respect to time
c. 0 m/s2, v is const

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