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Questions and Answers
According to Newton's 3rd Law of Motion, what can be said about the relationship between action and reaction?
What is the relationship between linear acceleration and the force causing it according to Newton's Laws?
Which law of motion describes a body remaining at rest or in constant linear velocity unless acted upon by an external force?
In rotational motion, when does a body experience angular acceleration?
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What does Newton's 2nd Law of Motion state regarding the relationship between force and acceleration?
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Which law of motion relates the angular acceleration of a body to the torque causing it?
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What is the Law of Action-Reaction in rotational motion?
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In manual therapies like chiropractic, what does 'Tissue Slack' refer to?
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When preparing to assess or manipulate a joint, why are Tissue Slack and Line of Drive important?
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What does 'Line of Drive' represent in manual therapies?
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Which term describes the actual procedure used for a thoracic adjustment's tissue slack and line of drive?
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How does the Law of Action-Reaction apply to rotational motion?
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According to Newton's First Law of Motion, an object will remain at rest or in uniform motion unless ____________.
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In which equilibrium does an object remain motionless when acted on by forces?
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What is the Law of Acceleration according to Newton's Second Law of Motion?
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Which formula represents Newton's Second Law of Motion?
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In which type of equilibrium does an object remain in constant motion when acted on by forces, which is rare in the human body?
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Newton's First Law is also known as the Law of ____________.
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Study Notes
Newton's Laws of Motion
- Newton's 1st Law (Law of Inertia): a body remains at rest or in constant linear velocity unless compelled by an external force to change its state
- Applies to rotational motion: a body remains at rest or in constant angular velocity about an axis of rotation unless compelled by an external torque to change its state
- Newton's 2nd Law (Law of Acceleration):
- Linear motion: the linear acceleration of a body is directly proportional to the force causing it, takes place in the same direction in which the force acts, and is inversely proportional to the mass of the body
- Rotational motion: the angular acceleration of a body is directly proportional to the torque causing it, takes place in the same rotary direction in which the torque acts, and is inversely proportional to the mass moment of inertia of the body
- Newton's 3rd Law (Law of Action and Reaction): for every force, there is an equal and opposite directed force
- Applies to rotational motion: for every torque, there is an equal and opposite directed torque
Kinematics and Biomechanics
- Kinematics: study of movement without considering forces
- Arthrokinematics: study of joint movement
- Biomechanical principles:
- Planes of motion
- Typical joint morphology
- Types of forces
- Movements between joint surfaces
- Impact of forces on musculoskeletal tissues
- Muscle's action at a joint
- Close-pack vs. loose-pack positions
Muscle and Joint Movement
- Tissue slack: the resultant vector applied to the skin before palpation or adjustment of a joint
- Line of drive: the resultant vector of force applied to the joint during palpation or adjustment of the joint
- Muscle contractions: different types (e.g., isometric, concentric, eccentric)
- 3-lever systems and their mechanical advantage
Forces and Motion
- Types of forces: external, internal, and gravitational
- Center of mass vs. center of gravity
- Loads: axial, compressive, tensile, and shear
- Stress and strain curves: relationships between force and deformation
- Musculoskeletal torques: rotational forces that cause twisting or rotation
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Description
Test your knowledge on Newton's Laws of Motion, including the Law of Action and Reaction, Law of Inertia, and the differences between Linear and Rotational Motions.
