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3 August, 06:58

How many revolutions does the object make during the first 4.0 s?

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  1. 3 August, 07:28
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    Radians/second * seconds = Radians BUT the angular velocity is not constant in this case so we need to integrate ω over time. We know this integral is the area under the curve which we can find using the plot: 20rad/s*2s + (10+5) + 10*0.4 = 59 radians 59 radians * 1rev/2π radians = 59/2π = 9.4 revolutions
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