Aptitude Test Problems in Physics Science for Everyone by S Krotov ( PDFDrive.com )

Solutions (^173)
Then
t.= Ati+ At 2 +. AtN

1 (A/) 2

2 (A/) 2 N (Al) 2 (Al) 2 N (N+1)

VT yr VT 2 •

Since N is large, we have

(A/) 2 N 2 12

t —

2vr 2vr '

/= V2vrt.

Fig. 173

1.72. During the time T, the distance covered by

the blue ball is co (u T = 2n/TIT3 (Fig. 174),

where co = 2n/ T is the rotational frequency. Dur-

ing the same time, the centre of mass of the green

b

27r1/

-)

i3 T

ur

and the white ball will be displaced by a distance

co (1/2 T The rod connecting the green