Question

question 19 (1 point)
it is possible for an object to have an average velocity equal to zero over a given time interval even if the objects average speed is not zero over the interval.
true
false
question 20 (1 point)
the slope of a position-time graph represents
displacement
speed
velocity
acceleration
distance
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Explanation:

For Question 19: Average velocity is total displacement over time (zero if the object returns to its starting point), while average speed is total distance over time (positive if the object moved). This scenario is possible.
For Question 20: On a position-time graph, the slope is calculated as change in position divided by change in time, which is the definition of velocity.

Answer:

Question 19: True
Question 20: velocity