Lecture09

Lecture09 - Chapter 10 Rotation 1 PHYS 2101, P.M.Shikhaliev...

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Unformatted text preview: Chapter 10 Rotation 1 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 10.2. The Rotational Variables Rotational motion: Angular position Angular displacement Angular velocity Angular acceleration Linear motion: Linear position Linear displacement Linear velocity Linear acceleration 2 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 10.2. The Rotational Variables: Angular Position Angle is measured in degrees, in radians (rad) , and in revolutions (rev). When , Let us s is length of an arc, and q corresponding angle. definition of the radian r s x , , 3 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 360 o = 2 rad = 1rev 10.2. The Rotational Variables: Angular Displacement If a body rotates about the rotation axis as in, changing the angular position of the reference line from q 1 to q 2 , the body undergoes an angular displacement Dq given by Dq = q 2- q 1 An angular displacement in the counterclockwise direction is positive, and one in the clockwise direction is negative. 4 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 10.2. The Rotational Variables: Angular Velocity Suppose that a rotating body is at angular position q 1 at time t 1 and at angular position q 2 at time t 2 . Then the average angular velocity ....
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Lecture09 - Chapter 10 Rotation 1 PHYS 2101, P.M.Shikhaliev...

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