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Grade 11 Forces and Motion
Given a force diagram like the one below, if the object is not moving, what do you know about the forces at A and B?
Free Body Diagrams 1
  1. [math]F_"norm"[/math] is less than [math]F_g[/math] because the object stays down on the surface.
  2. [math]F_g[/math] is always greater than [math]F_"norm"[/math] when an object is not moving.
  3. [math]F_"norm"=F_g[/math] when an object is not moving.
  4. [math]F_"norm"=-(F_g)[/math] making the [math]F_"net"=0[/math] when an object is not moving.
Grade 11 Forces and Motion

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Grade 8 Stars
The H-R diagram plots the
  1. absolute magnitude vs. apparent magnitude
  2. mass vs. absolute magnitude
  3. luminosity vs. surface temperature
  4. surface temperature vs. mass
Grade 11 Forces and Motion
If a net force diagram is drawn, such as shown below, wherein the [math]F_"norm"" at A "=-(F_g)" at C"[/math], what do you know about the object?
Free Body Diagrams 4
  1. The object is accelerating in the direction of the [math]F_"app"" at B"[/math] because there is no opposing force to B, and [math]F_"app"" at "B>0N[/math].
  2. The object is accelerating in the opposite direction of [math]F_"app"" at B"[/math] because forces act in equal but opposite pairs.
  3. The object is not moving because the [math]F_"net"=F_"norm"+F_g=0N[/math].
  4. The object is accelerating in the direction of the [math]F_"app"" at B"[/math] because the opposing [math]F_"fric"[/math] must be negligible, and [math]F_"app"" at "B>0N[/math].
Grade 11 Forces and Motion

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Grade 11 Forces and Motion

This question is a part of a group with common instructions. View group »

Grade 8 Circulatory and Immune Systems
Grade 8 Nervous and Endocrine Systems
Which structure is represented by the letter "C" on the human ear diagram?
Ear Diagram
  1. Incus or anvil
  2. Stapes or stirrup
  3. Malleus or hammer
  4. Semicircular canals
Grade 8 Nervous and Endocrine Systems
Which structure is represented by the letter "F" on the human ear diagram?
Ear Diagram
  1. Cochlear nerve
  2. Tympanic cavity
  3. Vestibular nerve
  4. Semicircular canals
Grade 8 Nervous and Endocrine Systems
Which structure is represented by the letter "H" on the human ear diagram?
Ear Diagram
  1. Cochlear
  2. Round window
  3. Eustachian tube
  4. External auditory canal
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