Axis Reference Systems
Quick Quiz #1
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Which of the following coordinate systems is most commonly used to describe position and motion of the human body?
Cylindrical
Spherical
Rectangular
The X axis defines?
Anterior/Posterior
Right/Left Lateral
Inferior/Superior

The Y axis defines?
Anterior/Posterior
Right/Left Lateral
Inferior/Superior

Any two forces can be replaced by a single force which is called the?
Resultant
Dot product
Cross product

In order for an object to be in a state of equilibrium, the sum of forces acting upon it needs to be equal to zero.
True
False

Force, velocity, and acceleration all can be described by a vector having magnitude and direction.
True
False

If a 100 pound force is applied to an object at an angle that is 60 degrees to the X axis, what is the magnitude of the component of the force that is directed along the X axis?
70.7
50.0
86.6

What is the magnitude of the component of the force that is directed along the Y axis?
70.7
50.0
86.6

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