13 s(t) = 4t+ 3t

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.6: Quadratic Functions
Problem 38E
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Exer. 13-14: The position function s of a point P moving
on a coordinate line / is given, with t in seconds and s(t)
in centimeters. (a) Find the average velocity of P in the
following time intervals: [I, 1.2}, [1, 1.1], and [1, 1.01].
(b) Find the velocity of P at t = 1.
13 s(t) = 412 + 3t
14 s(t) = 21 – 31²
%3D
15 A rescue helicopter drops a crate of supplies from a
height of 160 ft. After t seconds, the crate is 160 – 1612
feet above the ground.
-
(a) Find the velocity of the crate at t = 1.
%3D
(b) With what velocity does the crate strike the
ground?
16 A projectile is fired directly upward from the ground
with an initial velocity of 112 ft/sec. Its distance above
the ground after t seconds is 112t - 16t2 feet.
(a) Find the velocity of the projectile at t= 2, t= 3,
and t = 4.
%3D
%3D
(b) When does the projectile strike the ground?
(c) Find the velocity at the instant it strikes the ground.
Transcribed Image Text:Exer. 13-14: The position function s of a point P moving on a coordinate line / is given, with t in seconds and s(t) in centimeters. (a) Find the average velocity of P in the following time intervals: [I, 1.2}, [1, 1.1], and [1, 1.01]. (b) Find the velocity of P at t = 1. 13 s(t) = 412 + 3t 14 s(t) = 21 – 31² %3D 15 A rescue helicopter drops a crate of supplies from a height of 160 ft. After t seconds, the crate is 160 – 1612 feet above the ground. - (a) Find the velocity of the crate at t = 1. %3D (b) With what velocity does the crate strike the ground? 16 A projectile is fired directly upward from the ground with an initial velocity of 112 ft/sec. Its distance above the ground after t seconds is 112t - 16t2 feet. (a) Find the velocity of the projectile at t= 2, t= 3, and t = 4. %3D %3D (b) When does the projectile strike the ground? (c) Find the velocity at the instant it strikes the ground.
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Author:
Swokowski
Publisher:
Cengage