Question

Problem 62a

Answer 1

Given information

We are given that:

Firefighter’s safety net length .

The survivor stretches the net length .

Step-by-step explanation

Step 1.

First, we need to know how fast the person was falling when he hit the net. We know how far he fell, so it is a simple task of determining the his velocity:

 

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which means we need to know how long he was falling:

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I will assume is initial velocity was zero. We can then solve the above equation for : (keep in mind is the distance he fell, and a is gravity, both of these are negative quantities so the negatives cancel).

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