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Kinematics Forces EnergyWaves &
Sound
Electricity &
Magnetism
Kinematics 100
In what region(s) is the object speeding up?
B
v
t (s)
2.8
(m/s)[N]
10.5
-7.3
2.4 5.0
A
C
Kinematics 200
Calculate the displacement of the object represented in the v-t graph.
B
v
t (s)
2.8
(m/s)[N]
10.5
-7.3
2.4 5.0
A
C
Kinematics 300Find the resultant displacement of the
following displacement vectors.
12m [E], 17m [N20W], 8m [W50S]
]84[90.9
84)04.1/85.9(tan
90.985.904.1
85.950sin820cos17
04.150cos820sin1712
1
22
NEmd
d
d
d
R
R
y
x
Kinematics 400
What direction should you aim your boat if you hope to paddle directly across a river which is flowing at 7.5m/s [W] and you are able to
paddle with a speed of 12m/s in still water? Assume you are standing on
the south side of the river.
Kinematics 500
A model rocket is launched from the ground with a velocity of
73m/s[E45N]. What is its horizontal range?
][540
)2.543(00184.00
00184.00
)45sin73(2
)81.9(0
2
2
2
2
2
2
1
2
1
2
11
11
2
1
2
2
Emd
dd
dd
dd
v
dadd
v
da
v
dvd
v
d
v
dt
tatvd
x
xx
xx
xx
y
xyxy
y
xy
y
xyy
y
x
x
x
yyy
Forces 100An object has a weight of 49.05N on Earth. What will its weight be on a planet where
g=3.43m/s^2?
Forces 200
A 10kg object is resting on a flat surface with static and kinetic
coefficients of friction of 0.35 and 0.20 respectively. If 25N of force is applied to the object, what will
be the force of friction?
Forces 300
A 10kg object is resting on a flat surface with static and kinetic coefficients of friction of 0.35 and 0.20 respectively. If 40N of force is applied to the object, what will be the force of friction?
Forces 400
Determine the maximum mass of the hanging object for the system to
remain static.
μs=0.500
m=10kg
Forces 500
You push a 12kg shopping cart at an angle of 25 degrees above the
horizontal with an applied force of 35N. The kinetic coefficient of
friction between the wheels and the ground is 0.10. Determine the
acceleration of the cart.
254.1
12)51.132)(1.0(25cos35
cos
51.132)81.9(1225sin35
0
s
ma
a
maFF
maFF
maF
NF
FFF
maF
x
x
xNkA
xfkAx
xx
N
gAyN
yy
Energy 100
Calculate the thermal energy released when 0.52kg of Uranium is completely annihilated via nuclear
fission.
Energy 200
How fast will an object be traveling after 10.0m if it is dropped from rest, provided air resistance is neglected?
Energy 300
Determine the shortest stopping distance of a 1500 kg car traveling
100km/hr on a horizontal road if the maximum static coefficient of
friction the tires are able to generate is 0.75
mg
vd
dmgmv
dFmv
EWE
smhrkmv
s
s
f
Kk
4.52)180cos()81.9)(75.0(2
78.27
cos2
0cos2
0cos2
/78.27/100
221
21
21
21
1
Energy 400How long, in minutes, will it take a 300W electric kettle which is 92%
efficient to bring 0.50kg of water to its boiling pt? The specific heat
capacity of water is 4200J/kgC and is initially at 25C.
min5.965.570276
157500
157500)25100)(4200)(500.0(
276)300(92.0
%100
sP
Qt
t
QP
JTmCQ
WP
P
P
out
out
out
in
out
Energy 500Determine the height of the first hill of a roller coaster with m=40,000kg if it leaves the first hill from rest and is traveling at 15m/s at the top of the second hill which is 17m high. The
average force of friction between the wheels and the track is 700N and the
length of track between the top of the first and second hill is 200m.
mh
mg
dF
g
vhh
dFmv
mghmgh
dFEEE
WEWE
f
f
fkgg
outTinT
29)81.9(000,40
)200(700
)81.9(2
1517
2
2
2
1
2
21
2
21
221
21
Waves 200
The shortest resonance length of an open air column is 7.5cm when played with a 1200Hz
sound. Determine the 2nd resonance length.
Waves 300Two nodes in an electromagnetic standing wave pattern are 6.1cm
apart. The source emits 2,450,000,000 electromagnetic waves each second. Determine
the velocity of the wave.
Waves 400Determine the temperature in a
room where the shortest resonance length of a closed air
column exposed to a 720Hz sound is 12cm.
Waves 500While watching a storm on a muggy 32C summer day, you record 2 times,
10 seconds apart from one another. The first time you record is a 5.2s delay
from when you see a flash of lightning to when you hear the corresponding
thunder. The next time delay you record is 4.7s. How quickly is the
storm approaching you?
smv
mtvd
mtvd
smv
storm /5.1710
43.164437.1819
43.1644)7.4(88.349
37.1819)2.5(88.349
/88.349)32(59.0331
22
11
Electricity & Magnetism 100
A compass is placed below a straight conductor whose
current is flowing [W]. What direction will the compass
needle point?
Electricity & Magnetism 200
A conductor is placed within a magnetic field whose field
lines point [S]. If the current flowing out of the plane that intersects the magnetic field, what is the direction of the
force the conductor experiences?
Electricity & Magnetism 300
Two loads of 15ohm and 25ohm are connected in series to a
battery. If the current flowing through the first load is
250mA, what is the potential difference at the battery?
Electricity & Magnetism 400
Two loads R1=200ohm and R2=600ohm are connected in
parallel to a battery. The current leaving the battery is
0.100A. Determine the current flowing through R2.
Electricity & Magnetism 500
A 110V power supply pushes charge through the combined
circuit as follows: R1=100ohm, connected in
series, then R2 & R3 connected in parallel with one
another, in series with R1. I1=0.250A, I2=0.100A.
Determine R3.
The Final Jeopardy Category is…
•Mr. Langlois
(Please write down your wager and give it to Mr. Langlois)
The brand of bike that
Mr. Langlois races.
Here’s the answer…
(Give your response in the form of a question)
FINAL Jeopardy