Question 13
A container ship left Manila Bay at 5:00 am. The following graph shows its speed over time. When does the ship have a non-zero acceleration?
Editorial review: use the elapsed-time axis and explain whether any option gives every required interval.
Original choices (retained for review):
A. From 5:00 am to 7:00 am and from 9:00 am to 10:00 am
B. From 7:00 am to 9:00 am and from 10:00 am to 11:00 am
C. From 5:00 am to 1:00 pm
D. From 7:00 am to 9:00 am, from 10:00 am to 11:00 am, and from 1:00 pm to 3:00 pm
E. From 1:00 pm to 3:00 pm
Editorial review: use the elapsed-time axis and explain whether any option gives every required interval.
Original choices (retained for review):
A. From 5:00 am to 7:00 am and from 9:00 am to 10:00 am
B. From 7:00 am to 9:00 am and from 10:00 am to 11:00 am
C. From 5:00 am to 1:00 pm
D. From 7:00 am to 9:00 am, from 10:00 am to 11:00 am, and from 1:00 pm to 3:00 pm
E. From 1:00 pm to 3:00 pm