AP PHYSICS 1 Kinematics falling with deceleration

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pow

Homework Statement


Captain American bails out of an airplane and falls 50 meters without friction. When the parachute opens, he decelerate at 2.0m/s2. He reaches the ground with a speed of 3.0 meters/sec.
a.) How long is captain america in the air?

do=
d=
vo=
v=3m/s
t= ?
a= -9.8m/s2 ??????? (this is where I am confused because of the deceleration of 2.0m/s2.

Homework Equations


d=do + Vo +1/2at2

The Attempt at a Solution

 

Answers and Replies

  • #2
kuruman
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This problem comes in two parts. Part 1 constant acceleration down at 9.8 m/s2. Part 2 constant acceleration up at 2 m/s2.
 

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