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

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. 13

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Fig. 135

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V toe <Owind

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Vloc> vwind

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Fig. 137

Solutions 125

of velocities vi oc and vw ind, the shape of the lower
part of the path will be different. It is a loop
(when vim > vwind, Fig. 136), or a parabola (when

Pi0C < vwind, Fig. 137), or a "beak' (when vion

=

vwind, Fig. 138). The latter case corresponds to the

Fig. 139

condition of our problem. Thus, the velocity of the

wind is vwind = vie = 10 m/s, and in order to find

its direction, we draw the tangent CC' from the

point of the "beak" to the path of the locomotive

(viz, the circle) relative to the ground.

1.23*. Let the merry-go-round turn through a cer-

tain angle ,:p (Fig. 139). We construct a point 0