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Interactive LearningWare 8.1 reviews the approach that is necessary for solving problems such as this one. A motorcyclist is traveling along a road and accelerates for 4.36 s to pass another cyclist. The angular acceleration of each wheel is 6.10 rad/s2, and, just after passing, the angular velocity of each is 75.2 rad/s, where the plus signs indicate counterclockwise directions. What is the angular displacement of each wheel during this time?

Respuesta :

Answer:

The angular displacement of each wheel is 269.92 rad

Explanation:

Given:

Angular acceleration [tex]\alpha = 6.10 \frac{rad}{s^{2} }[/tex]

Time to pass cyclist [tex]t = 4.36[/tex] s

Angular velocity [tex]\omega _{f} = 75.2 \frac{rad}{s}[/tex]

According to the equation of kinematics,

  [tex]\omega _{f} = \omega _{i} + \alpha t[/tex]

   [tex]\omega _{i} = \omega _{f} - \alpha t[/tex]

   [tex]\omega _{i} = 75.2 - 6.10 \times 4.36[/tex]

  [tex]\omega _{f} = 48.60[/tex] [tex]\frac{rad}{s}[/tex]

For finding angular displacement,

    [tex]\omega _{f} ^{2} - \omega _{i} ^{2} = 2 \alpha \theta[/tex]

Where [tex]\theta =[/tex] angular displacement,

  [tex]\theta = \frac{\omega _{f}^{2} - \omega _{i} ^{2} }{2\alpha }[/tex]

  [tex]\theta = \frac{5655.04 - 2361.96 }{2\times 6.10 }[/tex]

  [tex]\theta = 269.92[/tex] rad

Therefore, the angular displacement of each wheel is 269.92 rad