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(30 exact duplicates found)

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5 Written Questions

5 Matching Questions

  1. Centripetal Acceleration
  2. rotational speed
  3. centrifugal force
  4. Efficiency
  5. Formula for Centripetal Acceleration
  1. a Apparent outward force on a rotating or revolving body.
  2. b Newton's First Law states that a body in motion stays in motion at a constant speed and in a straight line unless acted upon by a net force; therefore, a force must be pulling inward on an object moving in a circular path in order to prevent it from moving in a straight path.
  3. c Number of rotations or revolutions per unit of time.
  4. d In a machine, the ratio of useful energy output to total energy input, or the percentage of work input that is converted to work output.
  5. e a = v^2/r = 4rπ^2/T
    where v = velocity, r = radius, T = period

5 Multiple Choice Questions

  1. Work done on an object is equal to the kinetic energy gained by the object. work = change in energy or W = change(KE)
  2. It is common to express totational rates in revolutions per minute (RPM).
  3. I = mr²
  4. This force is not an actual force; it is a fictitious force that seems to pull outwards on an object on a circular path. This effect is due to inertia, or the tendency for a moving object to follow a straight path.
  5. The product of force and lever-arm distance, which tends to produce rotation.
    Torque = lever arm × force

5 True/False Questions

  1. axis (pl. axes)I = ½ mr²


  2. Formula for Torquemotion with constant radius of curvature caused by acceleration being perpendicular to velocity


  3. *revolution*Spinning motion that occurs when an object rotates about an axis located within the object (usually an axis through its center of mass).


  4. Hoop about diameter:I = 1/3 mL²


  5. potential energyEnergy of position, usually related to the relative position of 2 things, such as a stone and the earth, or an electron and a nucleus.


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