Question

professional application train cars are coupled together by being bumped into one another. suppose two loaded train cars are moving toward one another, the first having a mass of 150,000 kg and a velocity of 0.300 m/s, and the second having a mass of 110,000 kg and a velocity of . (the minus indicates direction of motion.) what is their final velocity?

Answer 1

0.0295m/s is their final velocity of car when mass of 150,000 kg and a velocity of 0.300 m/s, and the second having a mass of 110,000 kg.

How can you calculate final velocity?

An object's final velocity (v) is equal to its starting velocity (u) plus acceleration (a), multiplied by the amount of time (t) that has passed since u to v.

Pi = Pf

m1u1 + m2u2 = (m1 +m2)v

where we have

m1 = 150,000kg is the mass of the first car

m2 = 110,000 kg is the mass of the second car

u1 = 0.300 m/s is the initial velocity of the first car

u2 = 0.300 m/s is the initial velocity of the second car

v = ? is the final velocity of the two cars together, after the collision

Solving the equation for v, we find

v = m1u1 + m2v2 / m1+m2

v = 0.0295m/s

And the direction (positive sign) is the same as the initial direction of the first car.

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