Applied Kinesiology-Exam 2

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Newton's First Law: aka Law of Inertia.
A body at rest or in uniform Motion will remain at rest or in uniform motion unless some external force is applied to it.
Inertia: The body's reluctance to change whatever its doing (this remaining stationary). Also characterized as the "laziness of an object".
Mass: Mass is a scalar quantity because it has magnitude only.
Unit of Mass: In kilograms (kg) or grams (g) in the metric and slugs int he English system
Newton's Second Law: When a body acted upon by a constant force, its relucting acceleration is proportional to the force applied and inversely proportional to the mass and the acceleration takes place in direction in which the force acts.
Newton's Third Law: To every action, there is an equal and opposite reaction.
When a body is at rest or in motion, the state of the body depends upon the reaction forces acting on it and not upon the action forces the body exerts on their bodies.
Pound: a force when applied to a mass of 1 slug. It will produce an acceleration of 1ft/s2.
Newton: a force when applied to a mass of 1kg it will produce an acceleration of 1m/s2.
Weight: weight and force have both magnitude and direction and are thus vector quantities.
Newton's 4th Law: aka Law of Universal Gravitational.
any two bodies attract each other with a force proportional to the product of their masses and universely proportional to the square of the distance between them.
Work: force times the distance through the force acts
w = f x d
Mass ENGLISH: slugs (s)
Mass METRIC: kilogram (kg)
Acceleration ENGLISH: ft/s2
Acceleration METRIC: m/s2
Force ENGLISH: slugft/s2 (pound)
Force METRIC: kgm/s2 (N)
Work ENGLISH: ftlb
Work METRIC: mN or (Joules)
Power ENGLISH: ftlb/s
Power METRIC: mN/s (J/s or Watt)
Potential Energy ENGLISH: ftlb
Potential Energy METRIC: mN (Joule)
Kinetic Energy ENGLISH: ftlb
Kinetic Energy METRIC: mN or (Joules)
Power: the rate at which work is being done or time rate of performing work
Power (equations): power = work/time
power = (f x d)/time
power = f (d/t)
power = f x v
Energy: the capacity to do work
6 Forms of Energy: 1. Chemical
2. Electric
3. Heat
4. Light
5. Mechanic
6. Nuclear
Torque: The larger thr force applied or the longer the force arm or both the greater the torque produced.
Force Arm: The perpendicular distance or the shortest distance from the axis of rotation to the line of action of the force
Torque (L): = Force (F) x Force Arm (dI)
Properties of Torque: 1. magnitude of how much turning effect
2.Direction of turning effect
3. Point of Force Application-the point at which the force is being applied to the system.
4. Line of Action Force-the line in which the force is being applied it extends in either direction and provides a reference line for determining the length of the force arm
Force: For two equal forces applied to a body, the force that has the longer force arm produces the greater torque
Speed ENGLISH: ft/s
Speed METRIC: m/s
Speed FORMULA: s = l/t
Velocity ENGLISH: ft/s
Velocity METRIC: m/s
Velocity FORMULA: v = d/t
Acceleration FORMULA: a = (vf-vi)/(tf-ti)
Mass ENLGISH: slug
Force ENLGISH: slugft/s2 (pound)
Force FORMULA: f = ma
Weight ENGLISH: slugft/s2 (pound)
Weight METRIC: kgm/s2 (N)
Weight FORMULA: Fg = mg
Power FORMULA: p = f(d/t) or f(v)
Potential Energy FORMULA: PE = mgh or Wh
Kinetic Energy METRIC: mN (Joule)
Kinetic Energy FORMULA: KE = 1/2 mv2
Torque ENGLISH: lbft
Torque METRIC: Nm (Joule)
Torque FORMULA: L = f(DI)

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