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Additional Questions (Lecture 18)

Additional Questions (Lecture 18).

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Additional Questions (Lecture 18)

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  1. Additional Questions (Lecture 18) General Physics 1, Discussion By/ T.A. Eleyan

  2. [1] During a certain period of time, the angular position of a swinging door is described by θ= 5.00 + 10.0t + 2.00t2, where θ is in radians and t is in seconds. Determine the angular position, angular speed, and angular acceleration of the door (a) at t = 0 (b) at t = 3.00 s. General Physics 1, Discussion By/ T.A. Eleyan

  3. [5] A disk 8.00 cm in radius rotates at a constant rate of 1 200 rev/min about its central axis. Determine (a) its angular speed, (b) the tangential speed at a point 3.00 cm from its center, (c) the radial acceleration of a point on the rim, and (d) the total distance a point on the rim moves in 2.00 s. General Physics 1, Discussion By/ T.A. Eleyan

  4. Consider a car driving at 20 m/s on a level circular turn of radius 40.0 m. Assume the car’s mass is 1000 kg. What is the magnitude of frictional force experienced by car’s tires? What is the minimum coefficient of friction in order for the car to safely negotiate the turn? General Physics 1, Discussion By/ T.A. Eleyan

  5. 1. Draw a free body diagram, introduce coordinate frame and consider vertical and horizontal projections 2. Use definition of friction force: General Physics 1, Discussion By/ T.A. Eleyan

  6. Consider a car driving at 20 m/s on a 30° banked circular curve of radius 40.0 m. Assume the car’s mass is 1000 kg. What is the magnitude of frictional force experienced by car’s tires? What is the minimum coefficient of friction in order for the car to safely negotiate the turn? General Physics 1, Discussion By/ T.A. Eleyan

  7. 1. Draw a free body diagram, introduce coordinate frame and consider vertical and horizontal projections 2. Use definition of friction force: General Physics 1, Discussion By/ T.A. Eleyan

  8. Example: Uniform Solid Cylinder A uniform solid cylinder has a radius R, mass M, and length L. Calculate its moment of inertia about its central axis The volume density of the shell is so the mass is General Physics 1, Discussion By/ T.A. Eleyan

  9. General Physics 1, Discussion By/ T.A. Eleyan

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