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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
8 Nov 2021

Given information

1. A model rocket is fired vertically upward from rest.

2. Its acceleration for the first three seconds is  at which time the fuel is exhausted and it become a freely "falling" body.

3. Fourteen seconds later, the rockets parachute opens , and the (downward) velocity slows linearly to  in  .

4. The rocket then "floats" to the ground at that rate .

Step-by-step explanation

Step 1.

We have

 

PHASE 1: . Period =

PHASE 2: Period =

When ;

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