Solving for Velocity: Elastic Collision of Two Balls with Different Mass in m/s

AI Thread Summary
In an elastic collision involving two balls, one with a mass of 30 kg traveling at 17.7 m/s strikes a second ball at rest with a mass of 1.2 kg. The conservation of momentum and kinetic energy principles are applied to determine the velocities after the collision. Using these equations, the velocity of the first ball after the collision is calculated to be approximately 17.1 m/s. The second ball's velocity is found to be around 0.6 m/s. This scenario illustrates the application of physics principles in solving for post-collision velocities.
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One ball traveling at 17.7 m/s strikes a second ball at rest in an elastic collision. If the mass of the first ball is 30 kg and the mass of the second is 1.2 kg, to the nearest tenth of a m/s what is the velocity of the first ball after the collision?

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you need a 2nd eq, conservation of momentum.
 
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