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March 27, 2017

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At t=0 the current to a dc electric motor is reversed, resulting in an angular displacement of the motor shaft given by
theta(t)= 258t - 20.4t^2 - 1.47t^3

How many revolutions does the motor shaft turn through between the time when the current is reversed and the instant when the angular velocity is zero?

  • College Physics - ,

    I figured it out! I wasn't putting the t at omega=0 in the first equation in properly before converting from radians to revolutions!

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