FORCES
CONTACT
NONCONTACT
BALANCED
GRAVITY
FRICTION
ELECTRICITY
MAGNETISM
ELECTROMAGNETIC
PUSH
PULL
S
P
S
Y
V
R
I
G
K
Q
E
J
N
B
G
R
E
K
U
G
K
O
R
W
D
L
E
I
A
A
D
E
R
V
G
J
W
A
J
E
E
W
O
L
R
A
F
O
R
C
E
S
V
W
R
C
E
O
A
D
I
E
L
E
C
T
R
I
C
I
T
Y
I
N
U
M
D
D
C
Y
H
L
T
D
T
R
I
U
C
T
J
A
J
Q
O
L
Y
Y
C
Z
O
S
X
E
Y
A
R
G
E
D
N
G
A
V
F
M
U
J
D
H
D
E
C
N
D
V
T
A
U
A
A
O
U
S
E
U
O
B
E
E
N
Z
A
I
E
G
L
U
N
O
F
I
L
Z
O
T
J
I
C
N
N
P
O
S
P
I
Q
E
C
U
G
I
I
E
T
E
N
U
N
I
I
S
N
D
H
O
I
S
E
O
T
J
C
L
G
M
O
A
O
H
P
J
A
M
U
I
I
Q
B
L
N
X
T
H
E
G
I
F
R
I
C
T
I
O
N
