A cameraman on a pickup truck is traveling westward at19 km/h while he videotapes a cheetah that is moving westward 24 km/h faster than the truck. Suddenly, the cheetah stops, turns, and then runs at 45 km/h eastward, as measured by a suddenly nervous crew member who stands alongside the cheetah's path. The change in the animal's velocity takes 1.8 s.
(a) Find its acceleration from the perspective of the cameraman?
(b) Find its acceleration from the perspective of the nervous crew member?