The cameraman on a pickup truck is moving westward at 17 km/h while he video-tapes a cheetah which is moving westward 25 km/h faster than the truck. Instantly, the cheetah stops, turns, and then runs at 45 km/h eastward, as measured by a suddenly nervous crew member who stands along-side the cheetah's path. The change in the animal's velocity takes 1.9 s. (Employ east as the positive direction.)
(a) Determine its acceleration from the prespective of the cameraman?
(b) Determine its acceleration from the perspective of the nervous crew member?