Each of the three graphs represents acceleration versus time for an object that already has a positive velocity at time t1. Which graphs show an object whose speed isincreasing for the entire time interval between t1 and t2?
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a
graph I, only
b
graphs I and II, only
c
graphs I and III, only
d
graphs I, II and III
answer is D.
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Detailed Solution
Acceleration is positive in all three graphs, so velocity increases in all three.
Each of the three graphs represents acceleration versus time for an object that already has a positive velocity at time t1. Which graphs show an object whose speed isincreasing for the entire time interval between t1 and t2?