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