2. 1D Motion / Kinematics - Part 2 of 2

2. 1D Motion / Kinematics / Conceptual Problems with Velocity-Time Graphs / Problem 2

In the graph depicted below, which time intervals, if any, indicate moments when the riverboat maintained a constant velocity over time?

between t = 0 s and t = 30 s

between t = 60 s and t = 80 s

between t = 80 s and t = 100 s

between t = 40 s and t = 60 s