Posted by Anonymous on .
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 19300km/h to 1600km/h in 4.0min
Stage B: A parachute then opened to slow it down to 321km/h in 94s
Stage C: Retro rockets then fired to reduce its speed to zero over a distance of 75m
Assume that each stage followed immediately after the preceding one and that the acceleration during each stage was constant.
part 1) Find the rocket's acceleration (in m/s^2) during stages A,B,and C.
Part 2) Find the total distance the rocket traveled (in km) during stage A,B,and C.

Physics 
drwls,
A) Divide the velocity change by the time interval cases A and B. For part C, where you are given the distance and not the time interval,
time interval = 2x/V ; a = V^2/(2x)
There will be a need to convert speeds to m/s
B) Multipy the average (mean) velocity of each stage by the corresponding time interval, and add them up.
Please show more effort if you wish further help.