Quiz 1 Questions and Answers PDF

# Question 1 What is untrue of arthrokinematic motion? - Is described by a moving bone on a stationary bone relative to the three cardinal planes. - The fundamental movements are roll, slide, and spin. - Spinning is the primary mechanism for joint rotation when the longitudinal axis of the moving...

# Question 1 What is untrue of arthrokinematic motion? - Is described by a moving bone on a stationary bone relative to the three cardinal planes. - The fundamental movements are roll, slide, and spin. - Spinning is the primary mechanism for joint rotation when the longitudinal axis of the moving bone intersects the surface of its articular mate at right angles. - Motions generally obey the convex-concave rule. # Question 2 Please match each term with its definition. | Prompts | Answers| |---|---| | Kinematics | Motion of a body without regard to the forces or torques that may produce the motion | | Kinetics | Describes the effect of forces on the body | | Translation | Linear motion in which all parts of a rigid body move parallel to and in the same direction as every other part of the body | | Curvilinear motion | All parts of a rigid body move along a curved line | # Question 3 Select all that are examples of INTERNAL forces - Muscle contraction - Joint reaction force - Force on a limb due to Gravity - mass of a limb # Question 4 Select all examples of EXTERNAL forces - Muscle contraction - Joint reaction force - Force on a limb due to Gravity - mass of a limb - resistance against the limb provided by another person, such as resistance applied to the patient during a manual muscle test - A resistance band during an exercise. # Question 5 Match each term with the most appropriate answer regarding levers. | Prompts | Answers| |---|---| | Lever Definition | Simple machine of a rigid rod suspended across a pivot point | | Mechanical Advantage of the muscle | ratio of the internal moment arm to the external moment arm | | Mechanical advantage of the external resistance | ratio of the external moment arm to the internal moment arm | | Most common lever class found in the human body | 3rd Class lever | | It's two features are 1) axis of rotation is located at one end of a bone, 2) the muscle or internal force possesses a greater leverage than the external force. | 2nd Class Lever | # Question 6 Inertia is proportional to the mass of the object, how is "mass moment of inertia" different from "mass"? - Mass Moment of Inertia depends on the distribution of mass from the axis of rotation - Mass Moment of Inertia is the linear equivalent to mass - Mass Moment of Inertia does not depend on mass at all - Mass Moment of Inertia is rarely important in analysis of human movement because most human movement does NOT involve rotation. # Question 7 Select all true statements regarding Newton's 1st Law - Described by the formula $Forces = mass \times acceleration$ - All linear and rotational velocities are zero when in static equilibrium - All linear and rotational velocities are NOT zero, but constant when in dynamic equilibrium - All accelerations are zero when in dynamic or static equilibrium. - Is commonly called the Law of Inertia - Is commonly called the law of acceleration - Is commonly called the law of Action-Reaction # Question 8 Select all true statements regarding Newton's 2nd Law - Described by the formula Forces = mass x acceleration - Linear acceleration of a body is directly proportional to the force causing it - Angular acceleration of a body around an axis of rotation and is proportional to the torque causing it - Angular acceleration of a body around an axis of rotation is directly proportional to the mass moment of inertia of the body - Is commonly called the Law of Inertia - Is commonly called the law of acceleration - Is commonly called the law of Action-Reaction # Question 9 Select all true statements regarding Newton's 3rd Law - Described by the formula Forces = mass x acceleration - For every action there is an equal and opposite reaction - A ground reaction force exerted simultaneously back on a person during initial contact of gait is an example of an interaction described by this law - The force exerted by gravity on the center of mass of the forearm simultaneously as the bicep contracts is an example of an interaction described by this law - Is commonly called the Law of Inertia - Is commonly called the law of acceleration - Is commonly called the law of Action-Reaction # Question 10 Which is NOT TRUE regarding the Impulse-Momentum relationship? - Impusle is a quantity of motion, where momentum is the force applied over a period of time - One derivation of this is: $F \times t = m \times \Delta v$ - The relationship is the reason you should follow through when you hit a baseball - Momentum is a quantity of motion, where impulse is the force applied over a period of time