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Your baby sister's toy car has an effective energy conversion efficiency of 47.1%, which means that 47.1% of the electric energy
given to the motor can be converted to translational kinetic energy. The mass of the car is 0.836 kg and powered by one 9V
battery (9.00 V). Determine the average current supplied to car's motor, if from initially at rest the car reaches a speed of
2.89 m/s after 7.88 s.
average current:
Amps

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