When the bullet hits the wooden block resting on the smooth horizontal table at a certain speed, the depth of the bullet into the wooden block is xcm, and the distance of the wooden block moving relative to the table is xcm, the ratio of the heat energy generated by the friction between the bullet and the wooden block and the kinetic energy lost by the bullet is 0

When the bullet hits the wooden block resting on the smooth horizontal table at a certain speed, the depth of the bullet into the wooden block is xcm, and the distance of the wooden block moving relative to the table is xcm, the ratio of the heat energy generated by the friction between the bullet and the wooden block and the kinetic energy lost by the bullet is 0

Say Does X have a pin?
Energy conservation, q = FS, phase = FX1
-FS bullet = e increment
FS = e minus
F (x2 + x1) = e minus
Q / E minus = X1 / (x2 + x1)
=1/2
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