Activity 9.1 B

1.


2.
a)   Δv = vf - vi -- 16 m/s f - 11 m/s f = +5 m/s
b) Δv = vf - vi -- 18 m/s f - 16 m/s f = +2 m/s
c) Δv = vf - vi -- 18 m/s f - 18 m/s f = 0 m/s
d) Δv = vf - vi -- 14 m/s f - 18 m/s f = -4 m/s
e) Δv = vf - vi -- 11 m/s f - 14 m/s f = -3 m/s

What did you find out?

It was gaining speed in the 0-20 second interval and the 20-40 second interval, it was slowing down in the 60-80 second and the 80-100 second intervals, and it was in velocity zero in the 40-60 second interval.