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PROBLEM 16.164 (Continued)
22
2
6 lb 1.5 ft (81.391 rad/s ) 0.23697 lb ft
0 since 0
ss
DD
I
I
a
a
= = ⋅
= =α
Disk S:
0 eff
:
SS
M M Pr = I
a
Σ=Σ
1.54914 ft 0.23697 lb ft 1.8356 lb
12
PP
=⋅=
90 30 36.206r
β
= °− °− = °
PROBLEM 16.CQ1
Two pendulums, A and B, with the masses and lengths shown are
released from rest. Which system has a larger mass moment of inertia
about its pivot point?
(a) A
(b) B
(c) They are the same.
PROBLEM 16.CQ2
Two pendulums, A and B, with the masses and lengths shown are
released from rest. Which system has a larger angular acceleration
immediately after release?
(a) A
(b) B
(c) They are the same.
PROBLEM 16.CQ3
Two solid cylinders, A and B, have the same mass m and the
radii 2r and r respectively. Each is accelerated from rest with a
force applied as shown. In order to impart identical angular
accelerations to both cylinders, what is the relationship
between F1 and F2?
(a) F1 = 0.5F2
(b) F1 = F2
(c) F1 = 2F2
(d) F1 = 4F2
(e) F1 = 8F2
PROBLEM 16.CQ4
A cord is attached to a spool when a force P is applied to the cord as shown. Assuming the spool rolls without
slipping, what direction does the spool move for each case?
Case 1: (a) left (b) right (c) It would not move.
Case 2: (a) left (b) right (c) It would not move.
Case 3: (a) left (b) right (c) It would not move.
PROBLEM 16.CQ5
A cord is attached to a spool when a force P is applied to the cord as shown. Assuming the spool rolls without
slipping, in what direction does the friction force act for each case?
Case 2: (a) left (b) right (c) The friction force would be zero.
Case 3: (a) left (b) right (c) The friction force would be zero.
PROBLEM 16.CQ6
A front wheel drive car starts from rest and accelerates to the right. Knowing that the tires do not slip on the
road, what is the direction of the friction force the road applies to the front tires?
(a) left
(b) right
(c) The friction force is zero.
PROBLEM 16.CQ7
A front wheel drive car starts from rest and accelerates to the right. Knowing that the tires do not slip on the
road, what is the direction of the friction force the road applies to the rear tires?
(a) left
(b) right
(c) The friction force is zero.
PROBLEM 16.F1
A 6-ft board is placed in a truck with one end resting against a
block secured to the floor and the other leaning against a vertical
partition. Draw the FBD and KD necessary to determine the
maximum allowable acceleration of the truck if the board is to
remain in the position shown.
PROBLEM 16.F2
A uniform circular plate of mass 3 kg is attached to two links AC and BD of the
same length. Knowing that the plate is released from rest in the position shown, in
which lines joining G to A and B are, respectively, horizontal and vertical, draw the
FBD and KD for the plate.
