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Eleventh Grade (Grade 11) Forces and Motion Questions

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Grade 11 Forces and Motion
Under what conditions does a pendulum exhibit a simple harmonic motion?
  1. Amplitude is small.
  2. Friction is negligible.
  3. Air drag is negligible.
  4. All of the above.
Grade 11 Forces and Motion
Given a force diagram like the one shown, if the object is not moving, what do you know about the forces at A and B?
Free Body Diagrams 1
  1. Fnorm is less than Fg because the object stays down on the surface.
  2. Fg is always greater than Fnorm when an object is not moving.
  3. Fnorm=Fg when an object is not moving.
  4. Fnorm=-(Fg) making the Fnet=0 when an object is not moving.
Grade 11 Forces and Motion
An athlete is whirling a hammer on a chain around their head. Neglecting air resistance, how would the horizontal acceleration and velocity of a hammer change if the they accedentially releases the chain?
  1. The horizontal acceleration and velocity of the hammer would be inward toward the thrower.
  2. The horizontal acceleration and velocity of the hammer would be straight down by gravity.
  3. The horizontal acceleration and velocity of the hammer would be along the Vtang vector.
  4. The horizontal acceleration and velocity of the hammer would be continue in a circle.
Grade 11 Forces and Motion
Grade 11 Forces and Motion
Archimedes stated that the buoyant force was equal to the                              .
  1. mass of the object
  2. volume of the fluid displaced
  3. weight of the object
  4. weight of the fluid displaced
Grade 11 Forces and Motion
Which of these is true for a body in mechanical equilibrium?
  1. The vector sum of all external forces is zero.
  2. The sum of the moments of all external forces about any line is zero.
  3. Both of the above.
Grade 11 Forces and Motion
According to Hooke’s Law, the graph of the applied force, F, as a function of the displacement of the spring, x, will be
  1. a straight line, with slope, k, passing through x=12.
  2. a straight line with slope, k, passing through x=1.
  3. a parabola passing through the origin.
  4. a straight line with slope, k, passing through the origin.
Grade 11 Forces and Motion
A pilot experiences a centripetal acceleration of 2g's while maneuvering a loop at a speed of 400 m/s. What is the radius of the loop? (g = 9.8ms2)
  1. 8.163×103m
  2. 8.163×106m
  3. 8.163×107m
  4. 8.163×108m
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
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