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Chapter 8: Q 461. (page 1009)

In Example 8.83, the solution h=-4is crossed out. Explain why.

Short Answer

Expert verified

h=-4is crossed out because h represents speed and the speed is always greater than or equal to0. It can never be negative.

Step by step solution

01

Step 1. Given information. 

In the exercise 8.83, hrepresents the Hamilton's downhill speed.

We have given equation ish2-8h-48=0

02

Step 2. To find the speed. 

h2-8h-48=0(h-12)(h+4)=0h-12=0,h+4=0h=12,h=-4

h cannot be negative. So, it is crossed out.

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