
Understanding Motion  Questions I.4.1
 Explain how to determine the average velocity for a specific interval when using
 a positiontime graph
 a velocitytime graph.
 Use the graph below for the following question.
 Briefly describe the kind of motion taking place in each stage of the diagram.
 As velocity increases what happens to the value of the slope? Where would the object have the greatest velocity? Where would its velocity be smallest but not zero? Where would the object have zero velocity?
 Explain how you would find the average velocity of the object from Interval A to Interval C?
 What is the average velocity of the object over the entire trip?
 When is the average speed of an object not equal to its average velocity? If these values are not equal which one will be larger? Why?
 Do speedometers and odometers measure vector quantities or do they measure scalar quantities? Explain.
 Classify the following as vector or scalar quantities: speed, velocity, distance, position, displacement, and time.
 Average velocity and instantaneous velocity are generally different quantities. Can they ever be equal for a specific type of motion? Explain.
 If the average velocity is nonzero for some time interval, does this mean that the instantaneous velocity is never zero during the interval? Explain.
 Match the positiontime graph with the situation. MATCH

