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kinematics

First Section of mechanics physics

TermDefinition
Acceleration the rate of change of velocity; a vector quantity
Acceleration due to gravity “g”: the acceleration a freely–falling object experiences if only gravity is acting
Area two-dimensional construct; units meters or centimeters-squared
Equilibrium the net force is zero
Force an interaction that causes an object to change velocity
Freely-falling only gravity acting; ignoring any air friction
Friction the force that arises when objects interact due to direct contact between them
gram a commonly used mass unit (FYI 28 grams is about 1 ounce)
Inertia a property of matter that resistances change in velocity
Instantaneous speed the average speed over an infinitesimal time; an “instant”
kilogram one thousand grams; the basic unit of mass in the MKS system of units
Liter 1000 ml = 1000 cm3
Mass (gravitational) the property of gravitational attraction; every bit of matter attracts every other bit of matter with a force called “gravity”
Mass (inertia) the property of inertia is the property that a force acts upon to cause an acceleration
Mass one of the properties of matter, manifested as inertia and gravitational attraction
Meter the basic unit of space in the metric system of units
Motion an object passing through space and time
Net Force the sum of all the forces acting on an object
Newton the unit of force; 1 Newton = 1 kg m/sec^2
Scalar quantity a quantity that requires only one number to specify it, the magnitude
Second the basic unit of time in both the English and metric unit systems
Speed (Average) the quotient of (change in position)/(time taken for that move)
Speed the rate of moving through space; m/sec; cm/sec; miles/hour; kilometers/hour
Support force the force that acts upwards on an object; generally equals the weight if an object is at rest.
Vector quantity a quantity that has both magnitude and direction (force, position, velocity, acceleration...)
Velocity speed with direction
inertia Generally stated as the resistance to change in motion
Volume three dimensions
Weight the support force opposing the attraction by a planet for an object
Weight the support force opposing the attraction by the earth for an object (some authors use this differently)
Created by: brownglarry
 

 



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