posted by Anonymous .
In January 2004, NASA landed exploration vehicles on Mars. Part of the descent consisted of the following stages:
Stage A: Friction with the atmosphere reduced the speed from 19300 to 1600 in 4.0 .
Stage B: A parachute then opened to slow it down to 321 in 94 .
Stage C: Retro rockets then fired to reduce its speed to zero over a distance of 75 .
Assume that each stage followed immediately after the preceding one and that the acceleration during each stage was constant.
A-Find the rockets acceleration (in m/s^2) for part A,B,and C
stage A: acceleartion=changevelocity/time
Stage B: ditto
Stage C: Vf^2=Vi^2+2*acceleration*distance solve for acceleration