Question

An open water tight railway wagon of mass 5×10 3 kg coasts at an initial velocity of 1.2m/ sec without friction on a railway track rain falls vertically downwards into the wagon what change then occurred in the kinetic energy of the wagon when it has collected 10 3 kg
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Answer 1

Answer:

600joules

Explanation:

from Cocm

5×10³×1.2=6×10³V'

v'=1m/s

∆ke=1/2mv²_1/2m'v'²

1/2×5×10³. ×(1.2)²-1/2×6×10³(1)²

600joules