Chapt. 14 Gravity 127
014 qmult 00686 1 3 3 easy math: ducial-value orbital speed 2 (fo2)
Extra keywords: A test follow-up to fo1 ! It can only be given as a follow-up!
29. Plutos mean radius of orbit around the Sun is 39.48168677 AU (Wikipedia: 2007sep25
Chapt. 2 One-Dimensional Kinematics 21
002 qmult 10520 2 3 1 mod math: Super-Armadillo on Mars fullmult
49. Super-Armadillo is on Mars where the acceleration due to gravity is g = 3.69 m/s2. Starting
from REST on the surfacesmack dab in Valles Marineris:
120 Chapt. 13 Equilibrium and Elasticity
e) Luckily cats actually reach terminal velocity after about 20 m and ex themselves around
to land on their feet: they pounce on the Earth. They usually survive in fair shapebut
its not a recommended cat experiment
Chapt. 29 Magnetic Fields Causing Forces 221
a) up pole; down pole
b) left pole; right pole
c) magnet; magnetite
d) south pole; north pole
e) north pole; south pole
029 qmult 00150 1 1 4 easy memory: pole mnemonic
6. The magnetic pole mnemonic is:
a) like
20 Chapt. 2 One-Dimensional Kinematics
a) acceleration upward
b) acceleration downward
d) initial velocity
e) parabolic motion
c) terminal velocity
002 qmult 00620 3 1 2 easy math: travel time, human terminal velocity 1
Extra keywords: physci
43. The term
Chapt. 13 Equilibrium and Elasticity 119
Full-Answer Problems
013 qfull 00100 1 3 0 easy math: horizontal balanced beam
1. A horizontal beam is balanced on a point pivot at xpivot = 0.200 m. The beam is uniform with
mass 0.1 kg and the center of mass is a
Chapt. 29 Magnetic Fields Causing Forces
Multiple-Choice Problems
029 qmult 00100 1 1 4 easy memory: magnetic eld incomplete denition
Extra keywords: magnetic eld denition
1. The magnetic eld is a:
a)
b)
c)
d)
vector eld that emanates from charge (but not
Chapt. 2 One-Dimensional Kinematics 19
002 qmult 00530 1 1 3 easy memory: free fall independent of mass: Galileo
Extra keywords: physci
35. It is reported that Galileo (circa 1590) dropped balls of dierent mass at the same time from
the top of the Leaning
118 Chapt. 13 Equilibrium and Elasticity
c) Why is there a center of mass, Alex?
d) Why is there a center, Alex?
e) Why is there a universe, Alex?
013 qmult 00400 1 3 5 easy math: simple beam torque calculation
4. An object of mass 1 kg sits on a horizont
Chapt. 28 Circuits 219
possible if and only if the circuit has all the devices in parallel with the battery. The proof
should be complete: i.e., no loopholes.
There is one bit that is tricky to the complete proof, and so you can take it as a given:
the po
18 Chapt. 2 One-Dimensional Kinematics
a)
N
i=1
N
2
vi
.
b)
N
N
i=1
1/vi
.
c)
N
i=1
vi
N
.
d)
N
i=1 vi ti
N
i=1 ti
N
.
e)
vi .
i=1
002 qmult 00400 1 1 2 easy memory: acceleration and speed
Extra keywords: physci
29. If an objects speed changes, the object
Chapt. 13 Equilibrium and Elasticity
Multiple-Choice Problems
013 qmult 00100 1 1 3 easy memory: rotational equilibrium
1. To be in rotational equilibrium, an object must have:
a)
b)
c)
d)
e)
zero angular momentum.
non-zero angular momentum.
constant angu
218 Chapt. 28 Circuits
Say we have just connected the circuit with the capacitor initially uncharged. What is
the formula for time-zero (i.e., initial) current in terms quantities appearing in the formula
just given? At time innity, what is the formula fo
Chapt. 2 One-Dimensional Kinematics 17
002 qmult 00250 1 1 5 easy memory: timeless equation
21. The constant-acceleration kinematic equation without the time variable (which can be called
the timeless equation for mnemonic reasons) is:
2
a) v 2 = v0 2ax.
116 Chapt. 12 Rotational Dynamics
b) Now assume the pulley does have rotational inertia. Estimate the rotational inertia of the
pulley assuming it is a uniform disk. Answer the questions from part (a) in this case.
012 qfull 01350 2 3 0 moderate math: rot
Chapt. 28 Circuits 217
028 qfull 00710 2 3 0 moderate math: charging an RC circuit
11. There is 15.0 k resistor and a capacitor in series. The capacitor is initially uncharged. At time
zero a constant potential of V0 = 12 V is suddenly applied across the
16 Chapt. 2 One-Dimensional Kinematics
are, respectively, the 1-dimensional denitions of average velocity, velocity,
acceleration.
a) average deceleration
e) average speed
b) deceleration
c) average acceleration
,
d) speed
002 qmult 00142 1 1 2 easy memor
Chapt. 12 Rotational Dynamics 115
13. Dingo the daredevil dog is backjust accept it. He is now on a no-slip track and he curls
himself into an exactly spherically symmetric ball (but not necessarily a uniform density one)
of radius rDingo . Starting from
222 Chapt. 29 Magnetic Fields Causing Forces
a) F = q E .
b) F = qv E .
c) F = qv B .
d) F = v B .
029 qmult 00410 1 1 5 easy memory: magnetic force does no work
14. The point-charge magnetic force law
can
. Thus, a useful potential energy
since
force for
Chapt. 14 Gravity
Multiple-Choice Problems
014 qmult 00100 1 4 2 easy deducto-memory: Newton gravitation law
1. Lets play Jeopardy! For $100, the answer is: He/she discovered the gravitation law (AKA
universal law of gravitation) of classical physics. Thi
228 Chapt. 30 Currents Causing Magnetic Fields
a) Jude law
b) dierential equation form of the Jude law
c) integral equation form of the Jude law
d) dierential equation form of Amp`res law
e
e) integral equation form of Amp`res law
e
030 qmult 00200 2 1 1
Chapt. 3 Vectors and Trigonometry 27
003 qmult 00302 1 1 2 easy memory: trig abbreviation
Extra keywords: too simple-minded even for tests
14. Trigonometry is often abbreviated to
a) triggy.
b) trig.
c) gono.
d) metro.
e) monstro.
003 qmult 00310 1 4 5 ea
126 Chapt. 14 Gravity
a) 0.
b) g = GM r2 r .
c) g =
GM
r.
r2
d) g =
GM
r.
r
e) innite.
014 qmult 00600 1 4 5 easy deducto-memory: Keplers 1st law
25. According to Keplers 1st law, the orbits of two gravitationally bound celestial bodies are:
a)
b)
c)
d)
Chapt. 30 Currents Causing Magnetic Fields
Multiple-Choice Problems
030 qmult 00100 1 1 5 easy memory: electro-magnetic connection
Extra keywords: physci if magnetism is covered
1. Hans Christian rsted (17771851) in 1820 found that a current (of electric
26 Chapt. 3 Vectors and Trigonometry
6. The prototype vector in physics (i.e., the one that is usually thought of setting what the standard
. One main reason for this is that of the physical
physical vector properties are) is
vectors, only
has extension i
Chapt. 14 Gravity 125
014 qmult 00340 1 3 4 easy math: ducial-value grav eld 2 (fg2)
Extra keywords: Hold for tests with fg1
18. Given that the Moons mass MMo = 0.0123 MEa (1/80)MEa and mean radius REa =
0.273 REa (1/4)REa (e.g., Wikipedia 2007sep25) (whe
226 Chapt. 29 Magnetic Fields Causing Forces
029 qfull 00600 1 3 0 easy math: Earth current, Earth magnetic moment
4. The magnetic moment of the Earth is 8.0 1022 J/T. As a simple model of the Earths current
assume that it ows in a circular path of radius
Chapt. 3 Vectors and Trigonometry
Multiple-Choice Problems
003 qmult 00100 1 4 5 easy deducto-memory: vector dened
Extra keywords: physci
1. Lets play Jeopardy! For $100, the answer is: An incomplete denition is that it is a quantity
with both a magnitude
124 Chapt. 14 Gravity
014 qmult 00250 2 1 3 mod. memory: mass and weight above Earth
Extra keywords: physci KB-59-25
13. An object has mass x and weight y on the Earths surface. What is its mass and weight at
2 Earth radii above the Earths surface? Note A
Chapt. 29 Magnetic Fields Causing Forces 225
029 qmult 00730 1 4 1 easy deducto-memory: Hall eect
Extra keywords: Hall eect
26. The Hall eect showed that:
a)
b)
c)
d)
e)
the charge carriers in metals had
the charge carriers in metals had
the charge carrie