Physics, 18.04.2021 23:20, alizpleyer
A railroad car of mass m is moving at speed v when it collides with a second railroad car of mass M which is at rest. The two cars lock together instantaneously and move along the track. What is the kinetic energy of the cars immediately after the collision?
a. 1/2mv^2
b. 1/2(M + m)(Mv/M)^2
c. 1/2(M+m)(mv/m)^2
d. 1/2(M+m)(mv/(m+M))^2
Answers: 1
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