Recent content by Cici2006

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    How Do You Calculate the Area Bounded by \( r = 8\cos(10\Theta) \)?

    thanks for the help i solved it
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    How Do You Calculate the Area Bounded by \( r = 8\cos(10\Theta) \)?

    Okay, let me state what i did in more detail: A=(1/2)integral 64(cos^2(10theta)) d(theta) =32 integral (1/2)(1+cos20theta) (theta) =16[theta-(1/20)sin20theta] did i do it correct so far? then i just plug in my bounds which are pi/20 to 3pi/20 right? now should i just multiply my...
  3. C

    How Do You Calculate the Area Bounded by \( r = 8\cos(10\Theta) \)?

    Homework Statement Find the area of the region bounded by r=8cos10\Theta Homework Equations The Attempt at a Solution I set r=0 to find \Theta, which i used for my bounds \Theta=pi/20, 3pi/20 A= \int(1/2)64cos^2(10\Theta) d\Theta
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    Kinetic Energy of Rolling Motion

    Oh I know what i did wrong now i forgot to multiply by 1/2. THanks for the help
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    Kinetic Energy of Rolling Motion

    I used that too and i still got it wrong.
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    Kinetic Energy of Rolling Motion

    Homework Statement A 12g CD with a radius of 7.0 cm rotates with an angular speed of 35 rad/s. What is its kinetic energy? Homework Equations The Attempt at a Solution I used K=(1/2)mv^2(1+I/mr^2) v=\omegar=(35rad/s)(0.07m)=2.45m/s K=(1/2)(0.012kg)(2.45m/s)^2(1)=0.36 And...
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    Area Calculation for Parametric Equation: x=t^3-5t, y=7t^2

    Homework Statement Find the area of the region enclosed by the parametric equation x=t^3-5t y=7t^2 Homework Equations The Attempt at a Solution I know how you set it up \int (7t^2)(3t^2-5)dt, but how do you find the bounds. I tried finding t and got t= (+/-)\sqrt{y/7} and you...