College Physics
1st Edition
ISBN: 9781938168048
Author: Paul Peter Urone, OpenStax, Roger Hinrichs
Publisher: OpenStax
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Textbook Question
Chapter 10, Problem 9CQ
A ball slides up a frictionless ramp. It is then rolled without slipping and with the same initial velocity up another frictionless ramp (with the same slope angle). In which case does it reach a greater height, and why?
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A solid rubber ball is released from the top of an incline of height h that makes an angle e with the horizontal.
(a) If the ball rolls without slipping, what is its speed when it reaches the bottom of the incline? (Use any variable or
symbol stated above along with the following as necessary: g for the acceleration of gravity.)
Vf
=
(b) If the ball instead slides without rolling and without friction, what is its speed when it reaches the bottom of the
incline? (Use any variable or symbol stated above along with the following as necessary: g for the acceleration of
gravity.)
V₁ =
(c)
Compare the time intervals required to reach the bottom in cases (a) and (b).
t
Frolling
tsliding
The 11 kg disk has an angular velocity of w = 20 rad/s. (Figure 1)
Figure
400 mm
500 mm.
200 mm-
↓
B
500 mm --
P (N)
2
-t(s)
1 of 1
If the brake ABC is applied such that the magnitude of force P varies with time as shown, determine the time needed to stop the disk. The coefficient of kinetic friction at B is μk = 0.4.
Neglect the thickness of the brake.
Express your answer to three significant figures and include the appropriate units.
t = 5.86
μА
X Incorrect; Try Again;
Provide Feedback
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?
Nex
A hoop with a mass of 2.75 kg is rolling without slipping along a horizontal surface with a speed of 4.5 m/s when it starts down a ramp that makes an angle of 25° below the horizontal. What is the forward speed of the hoop after it has rolled 3.0 m down as measured along the surface of the ramp?
Chapter 10 Solutions
College Physics
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