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BIOPHYSICS MIDTERMS > MODULE 3 > Flashcards

MODULE 3 Flashcards

1
Q

Basic mechanics

A

static forces, dynamic forces and all types of motion

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2
Q

physiological and anatomical biophysics include

A

Basic Mechanics, Fluid Dynamics, Acoustics and Optics, Heat and Energy, Materials Strengths and Elasticity

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3
Q

mechnaics in physics means

A

application of forces to physical objects

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4
Q

branch of biophysics that deals with the application of forces to biological objects

A

BIOMECHANICS

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5
Q

It is the mechanics of a living body especially of the forces exerted by muscles and gravity on the skeletal structure.

A

BIOMECHANICS

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6
Q

Biomechanics includes studying

A

a. THE MOTION OF ANIMALS
b. THE MECHANICS OF VARIOUS SYSTEMS WITHIN THE BODY
c. MECHANICS AT A CELLULAR AND SUBCELLULAR LEVEL

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7
Q

Biomechanics is studied at all levels:

A

Subcellular, Physiological and Environmental

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8
Q

TRUE OR FALSE: Biomechanics may be more closely related to bioengineering or biomedical engineering than biophysics.

A

TRUE

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9
Q

Physical quantities describing motion of living organisms

A
  1. Distance (d)
  2. Displacement (x)
  3. Speed (v)
  4. Velocity (v-bold)
  5. Acceleration (a-bold)
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10
Q

a scalar quantity that describes the total length of the path that the object travels.

A

DISTANCE

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11
Q

A vector quantity that describes the position of the object measured from a reference point. The quantity has both magnitude and direction.

A

DISPLACEMENT

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12
Q

A scalar quantity that describes the distance traveled in a given time interval.

A

SPEED; v = d_t/ t_t

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13
Q

Time rate of change of displacement

A

VELOCITY; v =∆x/ ∆t

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14
Q

A vector quantity that defines the time rate of change of velocity. It specifies how rapidly the velocity of an object is changing.

A

ACCELERATION

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15
Q

FORMULA FOR ACCELERATION:

A

a = (Vf - Vi)/ (tf - ti)

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16
Q

It is the distance covered by the body per unit time

A

SPEED

17
Q

TRUE OR FALSE: The average speed of a moving body can be never be zero.

A

TRUE

18
Q

TRUE OR FALSE: Speed of a moving body can be positive, negative, or zero (depending on point of reference)

A

FALSE, CAUSE IT IS VELOCITY

19
Q

TRUE OR FALSE: Velocity can be used as speed if it is linear direction.

A

TRUE

20
Q

Acceleration occurs when the object

A

SPEEDS UP; SLOWS DOWN; CHANGES DIRECTION

21
Q

Acceleration is zero if the ______________

A

Velocity is constant

22
Q

Changing an object’s state of motion

A

FORCE

23
Q

A quantitative description of the interaction between two physical bodies, such as an object and its environment.

A

FORCE

24
Q

3 ELEMENTS OF FORCE

A

Origin
Magnitude
Direction

25
Q

forces arise because of physical contact between force and object

A

CONTACT FORCES

26
Q

forces without physical contact between objects

A

ACTION-AT-A-DISTANCE FORCES

27
Q

CONTACT FORCES

A

FRICTION FORCE
TENSION FORCE
NORMAL FORCE
AIR RESISTANCE FORCE
APPLIED FORCE
SPRING FORCE

28
Q

ACTION-AT-A-DISTANCE FORCES

A

GRAVITATIONAL FORCE
ELECTRICAL FORCE
MAGNETIC FORCE

29
Q

An applied force is a force that is applied to an object by a person or another object (push and pull)

A

TRUE

30
Q

The force of gravity is the force with which the earth, moon, or other massively large object attracts another object towards itself. It is the weight of an object.

A

GRAVITY FORCE

31
Q

FORMULA FOR WEIGHT

A

W = m*g

32
Q

It is the vector sum of all the forces that act upon an object. It is also called as resultant force (R_F)

A

NET FORCE

33
Q

If the net force is 0, the acting forces acting upon an object is ____________________.

A

BALANCED

34
Q

If the net force is not equal to zero, the forces acting upon an object is __________________.

A

UNBALANCED

35
Q

These forces cause changed in the motion of an object, with different magnitude and direction.

A

UNBALANCED FORCES

36
Q

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

A

Newton’s Second Law of Motion: LAW OF ACCELERATION

a = Fnet/ m

Fnet = ma

BIOPHYSICS MIDTERMS (3 decks)

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