6N

8N

10N

14N

$400N$

$250\sqrt{3}N$

$400\sqrt{3}N$

$800N$

70N

80N

100N

120N

1

1/2

1/3

1/4

18N

20N

25N

35N

$80N$

$20\sqrt{2}N$

$40\sqrt{2}N$

$60N$

50N

100N

200N

400N

$40\sqrt{5}N$

$30\sqrt{5}N$

$80N$

$120N$

20cm

30cm

40cm

50cm