2 years ago

The rate an object is moving relative to a reference point is its

Physics

1 answer:

natulia [17]2 years ago

5 0

Velocity is an object's rate of change (usually over time) of its displacement.

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3 years ago

An automobile starter motor has an equivalent resistance of 0.0510 Ω and is supplied by a 12.0 V battery with a 0.0090 Ω interna

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a) 200A

b) 10.2V

c) 2.04kW

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V=4.08V

P=0.326kW

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Here we have a circuit of one power source and two resistors in series, the first question is asking for the current, so according to Ohm's Law:

$I=\frac{V}{R}$

Where R is the equivalent resistance of the resistors in series

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$I=\frac{12.0}{0.0600}=200A$

To calculate the voltage dropped by the motor we have to apply the voltage divider rule:

$V_m=V*\frac{R_m}{R_m+R_s}\\V_m=12.0*\frac{0.0510}{0.0600}\\V_m=10.2V$

The power dissipated supplied to the motor is given by:

$P=I^2*R_m\\P=(200)^2*0.0510=2.04kW$

now solving adding a 0.0900 ohm resistor:

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3 years ago

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T = IAB SinФ, where B = Magnetic field, Ф = Angle
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