(^156) Aptitude Test Problems in Physics
The kinetic energy of the system after the collision
(sticking together) of the bodies will become
m -I- m
Wk
i. (^2) (4+ UV -= 7711V? + Mell
' ' k (^2) 2 (mi + m 2 ) •
Thus, the amount of heat liberated as a result of
collision will be
Q = mint2^ (v?^ 4.3 J.
yA
— 2 (771.1+ m2)
frit lit
1'2 1 '2
Fig. 159
1.54. Since there is no friction, external forces do
not act on the system under consideration in the
Fig. 160
horizontal direction (Fig. 160). In order to deter-
mine the velocity v of the left wedge and the veloc-
ity Is of the washer immediately after the descent,
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