Vector Mechanics For Engineers
12th Edition
ISBN: 9781259977305
Author: BEER, Ferdinand P. (ferdinand Pierre), Johnston, E. Russell (elwood Russell), Cornwell, Phillip J., SELF, Brian P.
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 12.2, Problem 12.90P
A 1 -kg collar can slide on a horizontal rod that is free to rotate about a vertical shaft. The collar is initially held at A by a cord attached to the shaft. A spring of constant 30 N/m is attached to the collar and to the shaft and is undeformed when the collar is at A. As the rod rotates at the rate
the mass of the rod, determine (a) the radial and transverse components of the acceleration of the collar at A, (b) the acceleration of the collar relative to the rod at A, (c) the transverse component of the velocity of the collar at B.
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Rod OA rotates counterclockwise at a constant angular
rate 0-4 rad/s. The double collar B is pin-connected
together such that one collar slides over the rotating rod
and the other collar slides over the circular rod described
by the equation r= (1.6 cos 6) m. Both collars have a
mass of 0.65 kg. Motion is in the vertical plane.
(Figure 1)
Figure
r=1.6 cos 9.
0-4 rad/s
0.8 m
1 of 1
Part A
Determine the magnitude of the force which the circular rod exerts on one of the collars at the instant 0=45
Express your answer to three significant figures and include the appropriate units.
▸ View Available Hint(s)
F= Value
Submit
μÁ
Part B
Previous Answers
Units
X Incorrect; Try Again; 5 attempts remaining
Determine the magnitude of the force that OA exerts on the other colar at the instant @-45.
Express your answer to three significant figures and include the appropriate units.
View Available Hint(s)
. An object of mass 12 kg is suspended from a pulley which has a mass of 6 kg and a radius of
rotation of 0.25 m. If at that time the pulley rotates with an angular velocity of 5 rad/s, we want to
know that when the object moves down a distance of 2 m, then at what speed is the pulley
rotating? If the friction force on the pulley bearing produces a moment of resistance of 2 N-m
12 kg
0.3 m
Rod OA rotates counterclockwise at a constant angular
rate -4 rad/s. The double collar B is pin-connected
together such that one collar slides over the rotating rod
and the other collar slides over the circular rod described
by the equation r= (1.6 cos ) m. Both collars have a
mass of 0.7 kg. Motion is in the vertical plane. (Figure 1)
Figure
1 of 1 >
7= 1.6 cos 8.
0
8=4 rad/s
0.8 m
B
Part A
Determine the magnitude of the force which the circular rod exerts on one of the collars at the instant
Express your answer to three significant figures and include the appropriate units.
▸ View Available Hint(s)
HÅ
F-35.8
N
Submit Previous Answers
X Incorrect; Try Again; 4 attempts remaining
Part B
Determine the magnitude of the force that OA exerts on the other collar at the instant-45
Express your answer to three significant figures and include the appropriate units.
▸ View Available Hint(s)
FOA- ON
Previous Answers
Chapter 12 Solutions
Vector Mechanics For Engineers
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