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Eleventh Grade (Grade 11) Mechanics Questions

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Grade 11 Forces and Motion
Which of these situations can Hooke’s Law NOT be applied to?
  1. shearing of a block of rubber
  2. bending of a concrete beam supported at both ends
  3. twisting of a stretched steel wire
  4. swinging of a pendulum
Grade 11 Motion in Two- and Three-Dimensions
The rate at which a rotating object spins, its angular velocity, can be expressed in all of the following ways except
  1. degrees/sec.
  2. rotations/sec.
  3. rad/sec.
  4. rpm.
  5. revolutions/sec.
Grade 11 Motion in Two- and Three-Dimensions
What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?
  1. 5 m/s2
  2. 10 m/s2
  3. 17.63 m/s2
  4. 8.81 m/s2
Grade 11 Fluid Mechanics
What kind of forces are dominant in turbulent flows?
  1. inertial forces
  2. viscous forces
Grade 11 Fluid Mechanics
The ideal gas law predicts that the molar volume (volume of one mole) of gas equals
  1. (MW)P/RT.
  2. gRT/PV.
  3. RT/P.
  4. 1/2ms-2.
  5. 22.4 L at any temperature and pressure.
Grade 11 Forces and Motion
In a simple pendulum, decreasing its length by a factor of 4 will                                        .
  1. double its frequency
  2. quadruple its period
  3. decrease its frequency by a factor of 2
  4. decrease its period by a factor of 4
Grade 11 Forces and Motion
Match the feature of the stress strain diagram with its explanation on the right.
__ Elastic Region A. Material will not return to original shape
__ Plastic Region B. Deformation of the sample; i.e. change in length or shape
__ Elastic Limit C. Point at which material will no longer return to its shape and will begin to permanently deform
__ Stress D. A force that would stretch a sample
__ Strain E. A force that would push from one or more sides toward the middle
__ Ultimate Stress F. Maximum stress the material can handle
__ Tension G. Force per unit area
__ Compression H. No permanent change in shape
Grade 11 Forces and Motion
Why is atmospheric pressure different in Colorado than at sea level?
  1. Air pressure is greater at sea level because there is more humidity in the air.
  2. Air pressure is less in Colorado because more air is above us.
  3. Air pressure is greater in Colorado because more air pushes from below us.
  4. Air pressure is greater at sea level because more air is above you.
Grade 11 Fluid Mechanics
A real gas most closely approaches the behavior of an ideal gas under conditions of
  1. low P and T.
  2. STP.
  3. high P and low T.
  4. high P and T.
  5. low P and high T.
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