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- Kinesiology 304
- La Rue
- Kinetic Concepts for Analyzing Motion

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Definition of Force

push or pull acting on a body

Force Equation

F=MA

Units: N (kg)(m/s^{2})

lb: 4.45 N

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Definition of Mass

quantity of matter comprising a body

Units: Kg

1 Kg = 2.21 lbs

Definition of Weight

attractive force that the Earth exerts on a body

Weight Equation

Wt = Mg

g = -9.81 m/s^{2}

Units: N

Definition of Pressure

the force per unit of area over which a force acts

Pressure Equation

P = FA

Units: Pa (N/m^{2}) or N/cm^{2}

Definition of Volume

amount of space a body occupies

Volume Equation

V = WHD

Units: cm^{3}, m^{3}, L

Definition of Density

mass per unit of volume

Density Equation

p = M/V

Units: kg/m^{3}

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Definition of Specific Weight

Weight per unit of volume

Specific Weight Equation

S = W/V

Units: N/m^{3} or lb/ft^{3}

Definiton of Torque

Rotary force created by an eccentric force

- moment of force

Torque Equation

T = Fd

Units: Nm or Ftlb

Definition of Impulse

The product of force and the time over which force acts

Impulse Equation

I = Ft

Definition of Inertia

Tendency of a body to resist change in its state of motion

Free Body Diagram

sketch that shows all the force vectors acting on a sysytem

Center of Gravity (Mass)

point where body's gravity is equally balanced, no matter the body's position

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