The distance an object falls​ (when released from​ rest, under the influence of​ Earth's gravity, and with no air​ resistance) is given by ​d(t)=16t2​, where d is measured in feet and t is measured in seconds. A rock climber sits on a ledge on a vertical wall and carefully observes the time it takes for a small stone to fall from the ledge to the ground. a. Compute d′(t). What units are associated with the​ derivative, and what does it​ measure? b. If it takes 6.2s for a stone to fall to the​ ground, how high is the​ ledge? How fast is the stone moving when it strikes the ground​ (in miles per​ hour)?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section: Chapter Questions
Problem 18T
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The distance an object falls​ (when released from​ rest, under the influence of​ Earth's gravity, and with no air​ resistance) is given by
​d(t)=16t2​, where d is measured in feet and t is measured in seconds. A rock climber sits on a ledge on a vertical wall and carefully observes the time it takes for a small stone to fall from the ledge to the ground.
a. Compute d′(t).
What units are associated with the​ derivative, and what does it​ measure?
b. If it takes 6.2s for a stone to fall to the​ ground, how high is the​ ledge? How fast is the stone moving when it strikes the ground​ (in miles per​ hour)?
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