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Physics
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Gravity
Test #1
Terms in this set (16)
force
push or pull
net force
combination of all forces acting on an object & changing its motion
tension
stretching force
vector
arrow that represents magnitude & direction
vector quantity
amount that needs direction & magnitude
scalar quantity
only described by magnitude (time, area, volume)
mechanical equilibrium
state of steadiness when net force is zero
support force
upward force that balances weight of an object on a surface
resultant
sum of two or more vectors
static equilibrium
not moving
dynamic equilibrium
moving
What two quantities are necessary to determine a vector quantity?
Magnitude and direction
An example of a vector quantity
force
An example of a scalar quantity
time, area, volume
What does εF=0 mean?
It means all the forces acting add to zero
What is the net force on an object at rest?
Zero
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