Electromagnetism, dynamics and energy

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A 17KG cat with a charge of 2.377 x 10^16 C is propelled from a charged plate at 5000V, landing in a 3KG crate on wheels with a coefficient of friction of 0.1 over 0.50 meters. The dynamics of the scenario involve calculating the force exerted by the cat's charge and the resulting motion of the crate. The crate is eventually stopped by a spring with a spring constant of 700 N/M. The problem requires determining the compression of the spring after the crate comes to rest. The solution involves applying principles of electromagnetism, dynamics, and energy conservation.
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a 17KG cat is shot out of a hole in the side of a charged plate when the voltage is suddenly turned up to 5000V. The cat has a charge of 2.377^16c. He lands in a 3kg crate on wheels that has a µ=0.1 for o.50 meters. The crate is then put to stop by a spring 700 N/M. how much did the spring compress?
 
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