What happens to kinetic energy in a car collision?

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    A-level Momentum
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SUMMARY

In a collision between a moving car (mass 1050 kg, speed 50 mph) and a stationary car (mass 1200 kg), the two vehicles lock together post-impact. The final speed of the combined mass can be calculated using the conservation of momentum, resulting in a speed of approximately 21.43 mph. The kinetic energy lost during the collision is determined by comparing the initial and final kinetic energies, revealing that a significant portion of energy is transformed into sound, heat, and deformation of the vehicles.

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  • Ability to perform unit conversions (mph to m/s)
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RachelT
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first post so here goes: this question isn't hard but i can't seem to get the answer i should have.

'a car of mass 1050kg runs into the back of car b which is stationary with mass 1200kg. car A was moving at 50mph immediately before impact. after impact, the vehicles are locked together'

calculate the speed at which the 2 vehicles move immediately after collision and the amount of kinetic energy lost in the collision. what has happened to this energy?

any help appreciated. thank you!
 
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