sample lesson physics
TRANSCRIPT
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Y 5 a _
b _
6
X +X
c _ 4
Y
d _ 7
a _
a _
a _
a _
- a _
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a _
2a _
3a _
j
i
O
Y
X X
Y 2i
3i
1.5j
4j
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a _
5 b _
4
a + b _ _
| a + b| = | a | + | b | = 9 units _ _ _ _
3
a _
8b _
a + b _ _ 5
| a + b| = | a | | b | if | a | > | b | _ _ _ _ _ _
| a + b| = | | | |b a if | b | > | a | _ _ _ _ _ _
a +
b_ _
a _
b _
a + b
_
_
b _
a _ O
Q _
P _
q
Qq
R
a
PO
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c
a
b
a b
c
3 R
560 a
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Y
X
i
a_
j
O
Y
X
j
i
P Aax
a _
ay
B
q
O
a = s in qy a
a cos q = ax
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2
c _
1b_
2
3
a _
1
1
Y
OX
5
60 605 sin 60
5 cos 60
645
6 sin 45
6 cos 45 45
30
10
10 sin 30 10 cos 30
30
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10
3060
8
10 sin 30
8 cos 60 10 cos 30
8 sin 60
Ry
Rx
Rq
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2 120
2
2 cos 30
2 sin 30 2
3R
q1
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a 30
b
10
a cos 30
a sin 30
10
b
q
a
60
5
5
5 sin 60
a cos q 55 cos 6 0
a sin q
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F
120
120 120 F
F
XResolving F cos 60
F cos 60
F sin 60
F
F sin 60
F2
135
90F1
102 N
F2
F1
45 1 0 2 c s
4 5 o
1 0 s i 4
5 2 n
Y
X
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A
W1 20 N
B
50 NW2
T (tension in string B)B
W = 50N (wt. of block)2
TA
TB W1
W1
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B
60
O
W
A
100 N
60
T0
100 N
T = 100 N0
T cos 60 2
T sin 60 2
T0
T1
B
A
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N1
B
15 N (wt. of B)
N1
A
20 N (wt. of A)N2
s t r i n g
q
P l a n eq
qnormal
N
m g s i n q
T
mg cos qq
mg
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A
B
30
C
NA
T 1
W s i n
q A
q
WA
W cos qA
W i n
q s B
W c o s q
B
WB
q
T 2
T 1
N B
T2
WC
F1
30 A B F = 15 N2
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NB
F = 15 N2RB
20 N (wt. of B)
NA
A R
30 N
30
F1
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f 0.1 N
mNs
N
25 N
100 N
W sin 30
N
W30
W cos 30
mNs
30
F
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F sin 30
mNs F cos 30
W
N
30
n 3 W s i 0
N1 T m
N 1 k
W cos 30
W
N2
mNk 2
W
T
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T
W
37
R
mR
B A
37
W
R 1
RmR1
mR
T1
T2
BC
A
O
T2 T1
C B
103 10 NT = 10 32 T = 10 N1
T1
q
q
T2
O
T (tension in0string OA)
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T1
T0
T2
Y X
q
T3 T1
T2
W2 W1
53 37
T2T3
W2
53
53
T2
T1
W1
37
37
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T1
O
T3
T2
60
T2
T1
60
T3
30
T
W
T = 10
30
T1
T2
T2
W
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q
w
w
q
T T
W
qq
W
T
T = W
2 0 0 N
w37
A 45
W
N
100
f T1T cos45 0
T2
N
T sin45 0 T0
T1
T2
W
45
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F = 50 N40
R50N
40N
mR
45
F
70g
N
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a + b_
_
a
_ b _
a + b_
_
b _
a _ O
Qq
R
a
PO
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Chapter Tests 80 tests fortesting concepts learned ineach chapter.
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