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Biomechanics Exam I > Basics Quiz > Flashcards

Basics Quiz Flashcards

1
Q

What is the unit of measurement for force?

A

Newtons (N)

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2
Q

What is the definition of a Newton?

A

Amount of force required to give a 1-kg mass an acceleration of 1 meter/second/second

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3
Q

What type of quantity is force?

A

Vector

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4
Q

What is the formula for force?

A

Force = mass X acceleration

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5
Q

What is the definition of mass?

A

Quantity of matter that makes up a sample

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6
Q

What is the definition of acceleration?

A

Change in velocity over a unit of time

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7
Q

What is Newton’s first law of motion?

A

Law of Inertia - an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force

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8
Q

What is the definition of inertia?

A

Resistance to having its state of motion changed by application of force

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9
Q

What does it mean in regards to inertia to say that a system is in equilibrium?

A

It is either at rest or moving with a constant velocity

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10
Q

What is Newton’s second law of motion?

A

Law of Force and Acceleration - the acceleration of an object depends directly upon the net force acting upon the object and inversely upon the mass of the object (F=ma)

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11
Q

What is the benefit of using a drop piece for a chiropractic technique in regards to force?

A

Allows for increased acceleration, and therefore less force is needed to deliver the adjustment (F=ma)

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12
Q

What is Newton’s third law of motion?

A

Law of Action and Reaction - for every action, there is an equal and opposite reaction

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13
Q

What type of stress is the intensity of force perpendicular to the surface on which it acts? Parallel?

A

Normal stress = perpendicular

Shear stress = parallel

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14
Q

What type of friction exists when two contacting surfaces are not currently sliding relative to each other but do possess the potential for movement?

A

Static friction

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15
Q

What is the general ratio required to initiate a sliding motion between two bodies called?

A

Coefficient of (static) friction

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16
Q

What number represents a maximum coefficient of static friction?

A

1.0

17
Q

What is significant about the coefficient of both static and kinetic friction of synovial joints?

A

Almost frictionless (numbers extremely close to zero)

18
Q

What is the definition of force?

A

Action (push or pull) upon a body causing it to deform or move

19
Q

What type of friction exists when the two surfaces are already sliding relative to each other?

A

Kinetic friction

20
Q

What occurs to the number of friction force as soon as the applied parallel force exceeds static friction, and the object begins to slide?

A

It decreases (less force needed to maintain the sliding of an object than the initial movement)

21
Q

What is the term for the point about which a body rotates?

A

Axis of rotation

22
Q

What is the definition of a lever arm?

A

Perpendicular distance from an axis of rotation to a line along which a force acts

23
Q

What is the definition of torque?

A

Tendency of an eccentric force to rotate an object around an axis (product of force and lever arm)

24
Q

What is the benefit of having a long lever arm?

A

Less force needed for the same task

25
Q

The force of a muscle in our body is directly acting upon what specific area?

A

Insertion of that muscle onto a bone to move it

26
Q

What is the term for the axis upon which the lever rotates about in a lever system?

A

Fulcrum

27
Q

In what type of lever is the load/resistance between the fulcrum and effort?

A

Type 2

28
Q

With which type of lever is the effort between the fulcrum and the load/resistance?

A

Type 3

29
Q

What type of lever is a broom?

A

Type 3

30
Q

With which type of lever is the fulcrum between the effort and the load/resistance?

A

Type 1

31
Q

What type of lever is a claw hammer?

A

Type 1

32
Q

What type of lever is a fishing rod?

A

Type 3

33
Q

What type of lever is a stapler?

A

Type 2

34
Q

What type of lever is a see-saw?

A

Type 1

35
Q

What type of lever are tweezers?

A

Type 3

36
Q

What type of lever is a typical body lever system such as the biceps brachii flexion movement?

A

Type 3

37
Q

What is the rarest type of lever system in the body?

A

Type 1

38
Q

What type of lever system is the most common in the body?

A

Type 3

Biomechanics Exam I (5 decks)

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