PHYS115
g
= 9.8 m
1 inch = 2
1 pound
1 pound
‐
ANSWE
600 lbf
inch
Question
of 1 kilogWhat pow
a.2b.1c.0
d.
8
ANSWE
Potential
pot
E
m
This hap
1 day
1
Power =
5 - Fall 2012
m/s
2
25.4 mm
= 1 lb = 0.45
force = 1 lb
Qu
600
Wh
R:
600
0.454
inch
n 2 –
The we
gram. It drop
wer does the
6
23
10
W
3
1.3
10
W
0 W
3
82
10
W
R:
l energy tran
(change
g
pens over th
1 day
24 h
1 d
work
1
time
86.4
4 kg
f = 1 lb ×
g
uestion 1 –
T
0 lbf/in.
hat is its spr
g
1 in
25.4
1
eight in the a
ps 20 cm per
e gravitation
nsferred to cl
in height)
he course of
hour
day
3600
hou
3
1.96 J
23
4
10
s
The spring in
ring constant
m
N/m
0 N/m
t is not exten
nch
3
105,
10
m
adjacent wei
r day.
nal force exe
lock (= work
1
9.8
0.2
1 day which
secs.
ur
86,40
6
3
10
J/s
2
1 / 8
n the adjacen
t?
nded or comp
,000 N/m
1
ight
‐
driven c
ert on the clo
k done on clo
1.96 joules
h is
00 secs.
6
23
10
W
nt car shock
pressed, the
105 kN/m
clock has a m
ock?ock) is
s
Test 2 - N
absorber ha
e spring cons
mass
November 28,
as a stiffness
stant is zero
1 kg
20 c
per
2012
s of
g
cm
day

PHYS115
Question
ANSWE
Angular
(unit of r
Question
How mu
cane air h
a.
1
b.
1
c.
1
d.
1
ANSWE
Kinetic e
Going fro
100 times
ANSWE
See book
5 - Fall 2012
n 3 –
What is
N
∙
m
2
/s
kg
∙
m
2
/s
kg
∙
m/s
N
∙
m
R:
momentum
rotational m
n 4 –
The air
uch more/les
have than 1
10 times mor
100 times mo
10 times less
100 times les
R:
nergy is
1
2
om speed 20
s bigger. Kin
R:
k, figure at bo
s the SI unit
m is
(rotation
ass)
(unit o
r in a hurrica
s kinetic ene
kg of air mo
re
ore
ss
mass
speed
0 km/h to spe
netic energy
ottom of pag
of angular m
nal mass)
(a
of angular sp
ane travels a
ergy does 1 k
oving at only
2
1
2
d
mass
eed 200 km/
involves (sp
Questio
coefficie
ge 103
2 / 8
momentum?
angular spee
peed)
kg m
t 200 km/h.
kg of this hu
y 20 km/h?
2
s
speed
/h the speed
peed x speed
on 5 –
Which
ent of restitu
the speed of
cannot tell b
the baseball
the golf ball
?
d)
, so it has
2
1
m
kg m
s
urri
‐
1
2
mass
sp
gets 10x big
d) which the
h of the two
ution?
f the balls mu
ecause both
Test 2 - N
s the unit
2
m
/ s
.
peed
speed
gger, so (spe
en gets 100x
balls has a g
ust be know
balls start fr
November 28,
.
eed x speed)
bigger.
greater
wn
rom a 1 m he
2012
gets
eight

PHYS115
Question
How fast
a.8b.2c.1d.2
ANSWE
Argue as
Collision
110 km/h
Question
particula
The angu
a.
…
b.
…
c.
…
d.
…
ANSWE
Angular
(rotation
angular s
so does t
5 - Fall 2012
n 6 –
The bas
t is the baseb
80 km/h
230 km/h
120 km/h
210 km/h
R:
s in book pag
n speed is 12
h. Add bat sp
n 7 –
Spinnin
ar satellite de
ular moment
… 25 times sm
… 5 times sm
… 5 times lar
… unchanged
R:
momentum
nal mass)
(a
speed gets 5
he angular m
120 km
80 km/h
seball’s coef
ball after the
ge 106/107.
0 + 80 = 200
peed of 120 k
ng satellites
ecide to incr
tum of the s
maller
maller
rger
d
m is
angular spee
x bigger,
momentum.
m/h
ficient of res
e bat hit it?

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- Spring '13
- Cornelis(“Kees”)J.Uiterwaal
- Physics, Angular Momentum, Force, Mass, Speed 2: Cruise Control