Physics for Scientists and Engineers with Modern Physics
4th Edition
ISBN: 9780131495081
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Textbook Question
Chapter 10.9, Problem 1EE
Return to the Chapter-Opening Question, p. 248, and answer it again now. Try to explain why you may have answered differently the first time.
CHAPTER-OPENING QUESTION—Guess Now!
A solid kill and a solid cylinder roll down a ramp. They both start from rest at the same time. Which gets to the bottom first?
- (a) They get there at the same time.
- (b) They get there at almost exactly the same time except for frictional differences.
- (c) The ball gets there first.
- (d) The cylinder gets there first.
- (e) Can’t tell without knowing the mass and radius of each.
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You have a frictionless ramp that starts at a height of 2.0 m. You have three objects at the top: (1) a block which slides down the ramp (no friction) and (2) a solid sphere and (3) a solid cylinder which both roll down the ramp without sliding.
Assuming they start from rest, find the final velocity of all three objects at the bottom of the ramp.
Which one reaches the bottom first?
Briefly explain why they arrive at different speeds even though energy is conserved for all three.
Figure
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Part A
Determine the angular momentum of the 100-kg disk shown in (Figure 1) about point G,
measured clockwise. Suppose that w = 4 rad/s
Express your answer to three significant figures and include the appropriate units.
Enter positive value if the angular momentum is clockwise and negative value if the
angular momentum is counterclockwise.
HG =
Submit
Part B
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Value kg m²
m²/s
Request Answer
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Determine the angular momentum of the 100-kg disk shown in (Figure 1) about point
Directions: Use g = 9.80 m/s? and assume all numbers are accurate to 3
significant figures unless otherwise indicated. Answer/solve the following
question/problems and show all work. No credit will be given for answers without
any work or answers that are unsupported by the work displayed. Work that is
illegible, illogical, or un-clear may not receive credit.
1. Two objects, a cylinder and a hoop, roll down the ramp without slipping. They
start from rest at the same height and have the same mass and radius. State
which one reaches the bottom first and explain why? (lcyl = ½ MR?, Inoop =
MR?)
Hoop
Cylinder
Chapter 10 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 10.1 - In Example 103, we found that the carousel, after...Ch. 10.4 - Two forces (FB = 20 N and FA = 30 N) are applied...Ch. 10.7 - In Figs. 1020f and g, the moments of inertia for a...Ch. 10.8 - Estimate the energy stored in the rotational...Ch. 10.9 - Return to the Chapter-Opening Question, p. 248,...Ch. 10.9 - Find the acceleration a of a yo-yo whose spindle...Ch. 10 - A bicycle odometer (which counts revolutions and...Ch. 10 - Suppose a disk rotates at constant angular...Ch. 10 - Could a nonrigid object be described by a single...Ch. 10 - Can a small force ever exert a greater torque than...
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