University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem Q3.11DQ
In uniform circular motion, how does the acceleration change when the speed is increased by a factor of 3? When the radius is decreased by a factor of 2?
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A object of mass 3.00 kg is subject to a force FX that varies with position as in the figure below.
Fx (N)
4
3
2
1
x(m)
2 4 6 8 10 12 14 16 18 20
i
(a) Find the work done by the force on the object as it moves from x = 0 to x = 5.00 m.
J
(b) Find the work done by the force on the object as it moves from x
= 5.00 m to x = 11.0 m.
]
(c) Find the work done by the force on the object as it moves from x = 11.0 m to x = 18.0 m.
J
(d) If the object has a speed of 0.400 m/s at x = 0, find its speed at x = 5.00 m and its speed at x
speed at x = 5.00 m
speed at x = 18.0 m
m/s
m/s
=
18.0 m.
An EL NIÑO usually results in
Question 8Select one:
a.
less rainfall for Australia.
b.
warmer water in the western Pacific.
c.
all of the above.
d.
none of the above.
e.
more rainfall for South America.
A child's pogo stick (figure below) stores energy in a spring (k = 2.05 × 104 N/m). At position (✗₁ = -0.100 m), the spring compression is a maximum and the child is momentarily at rest. At position ® (x = 0), the spring is relaxed and the child is moving upward. At position
child is again momentarily at rest at the top of the jump. Assume that the combined mass of child and pogo stick is 20.0 kg.
B
A
(a) Calculate the total energy of the system if both potential energies are zero at x = 0.
(b) Determine X2-
m
(c) Calculate the speed of the child at x = 0.
m/s
(d) Determine the value of x for which the kinetic energy of the system is a maximum.
mm
(e) Obtain the child's maximum upward speed.
m/s
the
Chapter 3 Solutions
University Physics (14th Edition)
Ch. 3 - A simple pendulum (a mass swinging at the end of a...Ch. 3 - Redraw Fig. 3.11a if a is antiparallel to v1. Does...Ch. 3 - A projectile moves in a parabolic path without air...Ch. 3 - A book slides off a horizontal tabletop. As it...Ch. 3 - At the instant that you fire a bullet horizontally...Ch. 3 - A package falls out of an airplane that is flying...Ch. 3 - Sketch the six graphs of the x- and y-components...Ch. 3 - If a jumping frog can give itself the same initial...Ch. 3 - A projectile is fired upward at an angle above...Ch. 3 - In uniform circular motion, what are the average...
Ch. 3 - In uniform circular motion, how does the...Ch. 3 - In uniform circular motion, the acceleration is...Ch. 3 - Raindrops hitting the side windows of a car in...Ch. 3 - In a rainstorm with a strong wind, what determines...Ch. 3 - You are on the west bank of a river that is...Ch. 3 - A stone is thrown into the air at an angle above...Ch. 3 - A squirrel has x- and y-coordinates (1.1 m, 3.4 m)...Ch. 3 - A rhinoceros is at the origin of coordinates at...Ch. 3 - CALC A web page designer creates an animation in...Ch. 3 - CALC The position of a squirrel running in a park...Ch. 3 - A jet plane is flying at a constant altitude. 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