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

16 Aptitude Test Problems in Physics

Determine the acceleration al of the load

when it is still on the wedge.

1.21. An ant runs from an ant-hill in a

straight line so that its velocity is inversely

proportional to the distince from the centre

of the ant-hill. When the ant is at point A

at a distance / 1 = 1 m from the centre of

the ant-hill, its velocity v 1 = 2 cm/s.

What time will it take the ant to run

from point A to point B which is at a dis-

tance / 2 = 2 m from the centre of the ant-

hill?

1.22. During the motion of a locomotive

in a circular path of radius R, wind is blow-

ing in the horizontal direction. The trace

left by the smoke is shown in Fig. 8 (top

view).

Using the figure, determine the velocity

vwind of the wind if it is known to be con-

stant, and if the velocity v (^100) of the loco-
motive is 36 km/h.
1.23*. Three schoolboys, Sam, John, and
Nick, are on merry-go-round. Sam and John
occupy diametrically opposite points on a
merry-go-round of radius r. Nick is on an-
other merry-go-round of radius R. The po-
sitions of the boys at the initial instant are
shown in Fig. 9.
Considering that the merry-go-round
touch each other and rotate in the same di-
rection at the same angular velocity o,
determine the nature of motion of Nick
from John's point of view and of Sam from
Nick's point of view.
1.24. A hoop of radius R rests on a horizon-