Concept explainers
a.
To tell intercept meaning in situation.
a.
Answer to Problem 28E
t=2 is the time for ball to gain max height.
Explanation of Solution
Given information:
Calculation:
The expression is
Here, to find the intercept, solve equation for x ,
Dividing by -2,
Factorizing,
Solving,
Solving,
For intercept,
Here, time cannot be in negative, so, t=2 is the time for ball to gain max height.
b.
To find the time taken
b.
Answer to Problem 28E
34 sec is the time taken by volleyball to hit ground.
Explanation of Solution
To find the distance, differentiate
So,
Differentiating,
So,
And,
Time is
Solving,
Time=
So, Time=
And,
Time=
Hence, 34 sec is the time taken by volleyball to hit ground.
Chapter 9 Solutions
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