65. ssm A person who walks for exercise produces the position–time graph given with this problem. (a) Without doing any calculations, decide which segments of the graph (A, B, C, or D) indicate positive, negative, and zero average velocities. (b) Calculate the average velocity for each segment to verify your answers to part (a).

w0086

 

Segment A has a positive slope => positive average velocity

Segment B has a negative slope => negative average velocity

Segment C has a positive slope => positive average velocity

Segment D has a zero slope => zero average velocity

 

 

 

 

 

 

Segment

Slope

Average Velocity

A

Positive

 

 

 

B

Negative

 

 

 

C

Positive

 

 

 

D

Zero

 

 

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This page last updated on January 31, 2020