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

Answer 1

D. 5 meters/second2

Step-by-step explanation:

plato

Answer 2

Answer: OPTION D.

Step-by-step explanation:

We can use the Kinematic formula for an object under constant acceleration:

`V_f=V_0+at`

Where
`V_F` is the final velocity,
`V_0` is the initial velocity, "a" is the acceleration and "t" is the time.

In this case we know that:

`V_f=0\ (m)/(s)\\\\V_0=-150\ (m)/(s)\\\\t=30\ s`

Therefore, we must substitute these values into the formula and solve for "a":

`0\ (m)/(s)=-150\ (m)/(s)+a(30\ s)\\\\a=(150\ (m)/(s))/(30\ s)\\\\a=5\ (m)/(s^2)`