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Integrated Concepts(a) Assuming 95.0% efficiency for the

Chapter 20, Problem 64

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QUESTION:

Integrated Concepts

(a) Assuming \(95.0 \%\) efficiency for the conversion of electrical power by the motor, what current must the \(12.0-V\) batteries of a \(750-kg\) electric car be able to supply: (a) To accelerate from rest to \(25.0 \mathrm{~m} / \mathrm{s}\) in \(1.00 min\)?

(b) To climb a \(2.00 \times 10^{2}-m\) -high hill in \(2.00 min\) at a constant \(25.0-\mathrm{m} / \mathrm{s}\) speed while exerting \(5.00 \times 10^{2} \mathrm{~N}\) of force to overcome air resistance and friction?

(c) To travel at a constant \(25.0-\mathrm{m} / \mathrm{s}\) speed, exerting a \(5.00 \times 10^{2} \mathrm{~N}\) force to overcome air resistance and friction? See Figure \(20.44\).

Figure \(20.44\) This REVAi, an electric car, gets recharged on a street in London. (credit: Frank Hebbert)

Equation Transcription:

Text Transcription:

95.0%

12.0-V

750-kg

25.0 m/s

1.00 min

2.00 times 10^2-m

2.00 min

5.00 times 10^2 N

20.44

Questions & Answers

QUESTION:

Integrated Concepts

(a) Assuming \(95.0 \%\) efficiency for the conversion of electrical power by the motor, what current must the \(12.0-V\) batteries of a \(750-kg\) electric car be able to supply: (a) To accelerate from rest to \(25.0 \mathrm{~m} / \mathrm{s}\) in \(1.00 min\)?

(b) To climb a \(2.00 \times 10^{2}-m\) -high hill in \(2.00 min\) at a constant \(25.0-\mathrm{m} / \mathrm{s}\) speed while exerting \(5.00 \times 10^{2} \mathrm{~N}\) of force to overcome air resistance and friction?

(c) To travel at a constant \(25.0-\mathrm{m} / \mathrm{s}\) speed, exerting a \(5.00 \times 10^{2} \mathrm{~N}\) force to overcome air resistance and friction? See Figure \(20.44\).

Figure \(20.44\) This REVAi, an electric car, gets recharged on a street in London. (credit: Frank Hebbert)

Equation Transcription:

Text Transcription:

95.0%

12.0-V

750-kg

25.0 m/s

1.00 min

2.00 times 10^2-m

2.00 min

5.00 times 10^2 N

20.44

ANSWER:

Solution 64PE

a.)

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