<span>The mechanical energy is conserved.
I hope this helps, good luck! :)</span>
The other nation will get mad at the other nation and they could start a war
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Mass of yellow train, my = 100 kg
Initial Velocity of yellow train, = 8 m/s
mass of orange train = 200 kg
Initial Velocity of orange train = -1 m/s (since it moves opposite direction to the yellow train, we will put negative to show the opposite direction)
To calculate the initial momentum of both trains, we will use the principle of conservation of momentum which
The sum of initial momentum = the sum of final momentum
Since the question only wants the sum of initial momentum,
(100)(8) + (200)(-1) = 600 m/s
I would say 150 joules, i don't know if its right though check
C. Melt 1g if solid into liquid.
