Engineers are usi g computer models to study train collisions to design safer train cars. They start by modeling an elastic collision between 2 train cars traveling towards each other. Car 1 is traveling east at 6 m/s and has a mass of 3, 154kg. Car 2 is traveling west at 23 m/s and has a mass of 8,296kg. After the collision car 1 has a final velocity of 7 m/s west. What is the final velocity of car 2?

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W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j

Answer mechanical energy;