College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Chapter 2, Problem 42PE
Calculate the displacement and velocity at times of (a) 0.500, (b) 1.00, (c) 1.50, (d) 2.00, and (e) 2.50 s for a rock thrown straight down with an initial velocity of 14.0 m/s from the Verrazano Narrows Bridge in New York City. The roadway of this bridge is 70.0 m above the water.
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An object is thrown off the top of a 42 m tall building with a velocity of 475 m/s at an angle of 10.4° with respect to the horizontal.
(a) How long is the object in the air in seconds?
(b) What is the maximum height the object reaches above the ground in meters?
c) What is the horizontal distance the object covers in meters?
The position of a particle is r(t) = (5.0t2î – 4.0j + 6.0t³k) m.
(a)
What is the velocity of the particle at 0 s and at 1.0 s (in m/s)? (Express your answers in vector form.)
v(0 s)
m/s
v(1.0 s)
m/s
(b) What is the average velocity between 0 s and 1.0 s (in m/s)? (Express your answer in vector form.)
Vavg
m/s
A soccer player kicks a rock horizontally off a 32 m high cliff into a pool of water. If the player hears the sound of the splash 2.72 s later, what was the initial speed given to the rock (in m/s)?
Assume the speed of sound in air is 343 m/s.
Chapter 2 Solutions
College Physics
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