A space vehicle deploys its re–entry parachute when it's traveling at a vertical velocity of –150 meters/second (negative because the parachute is going down.) It comes to rest at 0 meters/second after 30 seconds. What's the average acceleration of the shuttle during this time span?
A.
-0.2 meters/second2
B.
-5 meters/second2
C.
0.2 meters/second2
D.
5 meters/second2

Question

A space vehicle deploys its re–entry parachute when it's traveling at a vertical velocity of –150 meters/second (negative because the parachute is going down.) It comes to rest at 0 meters/second after 30 seconds. What's the average acceleration of the shuttle during this time span?
A. 
-0.2 meters/second2
B. 
-5 meters/second2
C. 
0.2 meters/second2
D. 
5 meters/second2

Razor · Answer

Vertical meaning straight down, and the given speed is 150m per second. Given it took 30 seconds for the shuttle to reach the surface. What do you think your best guess is?