College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Chapter 2, Problem 5TP
To determine
The graphs showing the book's position vs. time and velocity vs. time if the direction of its motion is considered positive and if the direction of its motion is considered negative.
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A vehicle accelerates down an on ramp and eventually reaches highway speed. The position of the vehicle is described by the following equation:x(t) = At2/(t+B)
a)Write an expression for the vehicle’s instantaneous velocity as a function of time.
b)What is the vehicle’s velocity after accelerating for 7 seconds? The equation’s parameters are as follows. A = 35 m/s B = 23 s
c)After accelerating, the velocity of the vehicle will begin to level off at highway speed. Write an expression for the vehicle’s velocity after it has been accelerating for a long time.
d) Determine the value of the vehicle’s velocity after it has been accelerating for a long time. The equation’s parameters are as follows. A = 35 m/s B = 23 s
The position-time graph below depicts the motions of two objects, A and B. Which
of the following statements concerning the objects' motions is NOT true?
Position vs. Time
d
B
t
The two objects travel for the same amount of time.
The two objects have the same speed.
The two objects travel with uniform motion.
The two objects have the same velocity.
The two objects travel the same distance.
Answer the following questions. (True or False)
a. Motion and acceleration are not the same quantity. b. The speed of an accelerated body changes with time. c. A body can be accelerating even when it is not moving. d. The velocity of an accelerated body changes with time. e. The acceleration of a body with zero speed is zero.
Chapter 2 Solutions
College Physics
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