Physics Final Exam - Grade 11
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40 Terms
Significant figures
Valid digits in a measurement
Precision
Degree of exactness of a measurement
Accuracy
How well results agree with the true value
Independent variable
Variable manipulated in an experiment
Dependent variable
Variable that depends on the independent variable
Dimensional analysis
Treating units as algebraic quantities
Vector
Quantity with magnitude and direction
Scalar
Quantity with only magnitude
Distance
Total length of travel regardless of direction
Displacement
Distance and direction between points
Resultant
Vector sum of forces on an object
Speed
Rate of change of distance
Velocity
Distance traveled in a specific direction
Instantaneous speed
Speed at any instant
Average Speed
Total distance traveled over time taken
Instantaneous Velocity
Speed and direction at a particular instant
Position
Object's location relative to an origin
Average Velocity
Change in position over time interval
Instantaneous position
Object's location at a particular instant
Acceleration
Rate of change of velocity with time
Free fall
Object only under gravity's influence
Terminal velocity
Air resistance equals gravity
Contact force
Force when an external object touches a system
Field forces
Forces exerted without contact
Free body diagram
Representation of forces on a system
Weight
Gravitational force on an object
Mass
Amount of matter in an object
Inertia
the tendency of an object to resist changes in its motion
Equilibrium
Net force of an object is zero
Projectile
Object shot through the air
Trajectory
Projectile's curved path through space
Uniform circular motion
Object moving at constant speed in a circle
Centripetal acceleration
Acceleration towards the circle's center
Centripetal force
Force towards the circle's center
Circumference
Distance traveled in uniform circular motion
Range
Horizontal displacement of a projectile
Max. Height
Vertical displacement of a projectile
Angular velocity
Change in angular rotation over time
Period
Time for one complete circuit
Frequency
Number of revolutions in one second