Physics help on part B Assuming 95.0% efficiency for the conversion of electrica

Question

Physics help on part B

Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0 V batteries of a 730 kg electric car be able to supply:

Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0 V batteries of a 730 kg electric car be able to supply: (a) To accelerate from rest to 25.0 m/s in 1.00 min? (b) To climb a 200 m high hill in 2.00 min at a constant 25.0 m/s speed while exerting 510 N of force to overcome air resistance and friction? (c) To travel at a constant 25.0 m/s speed, exerting a 510 N force to overcome air resistance and friction?

Explanation / Answer

(a) 343 A

(b) 2.17

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