Review 3 (Kinetics Concepts) Flashcards
Which of the following will reduce the pressure of a baseball against a catcher’s hand?
Question options:
1) Reduce the force with which the ball is thrown
2) Wear a catcher’s mitt
3) Both reduce the force with which the ball is thrown and wear a catcher’s mitt
4) None of the choices is correct.
Both reduce the force with which the ball is thrown and wear a catcher’s mitt
A free body diagram includes which of the following?
Question options:
1) Sketch of an object, body, or body part being analyzed
2) Vectors representations of all forces acting on the system
3) Both choices are included in a free body diagram.
4) Neither of the above is included in a free body diagram.
Both choices are included in a free body diagram.
Mechanical stress in the lumbar vertebrae is less than expected because of which of the following structural details?
Question options:
1) Bears more weight or force than other vertebrae
2) Larger weight-bearing surface area than other vertebrae
3) Both bears more weight or force than other vertebrae and larger weight-bearing surface area than other vertebrae.
4) None of the above
Larger weight-bearing surface area than other vertebrae
Which of the following is true regarding a shot put and a softball of equal diameter?
Question options:
1) They have the same density.
2) They have the same volume.
3) Both A and B
4) None of the above
They have the same volume.
When 2 force vectors are acting parallel and in the same direction, how do you compose them into one vector?
Question options:
1) Resolve them
2) Subtract them
3) Divide them
4) Add them
Add them
When you wear a backpack, your center of gravity shifts in which direction?
Question options:
1) Up
2) Forward
3) Up and back
4) Back
Up and back
Which of the following is a correct unit of torque?
Question options:
1) Ns
2) kg m
3) N-m
4) N/s
N-m
The rotary effect created by an eccentric force defines which of the following?
Question options:
1) Moment of force
2) Torque
3) All of the above
All of the above
(Moment of force) , (Torque)
Which of the following is not true about mass?
Question options:
1) Affects force production
2) Measurement unit = kg
3) Changes depending on gravity
4) Quantity of matter
Changes depending on gravity
If two vectors lying in the same plane are added together and the result is zero, then which of the following is true of the vector quantities?
Question options:
1) They are equal in magnitude.
2) They are opposite in direction.
3) Both A and B
4) None of the above
Both A and B
(They are equal in magnitude) & (They are opposite in direction)
Which of the following is the angular equivalent of linear force?
Question options:
1) Stress
2) Torque
3) Pressure
4) Tension
Torque
When absorbing the force of a baseball, which of the following will change the impulse?
Question options:
1) Reduce the force with which the ball is thrown
2) Wear a catcher’s mitt
3) “Give” with the ball when catching
4) All of the above
All of the above
(Reduce the force with which the ball is thrown) , (Wear a catcher’s mitt) , (“Give” with the ball when catching)
Which of the following is a correct unit of inertia?
Question options:
1) psi
2) lg/m^3
3) lb/ft^3
4) None of the above
None of the above
Which of the following defines center of gravity?
Question options:
1) Intersection of the 3 cardinal planes
2) The point around which a body’s weight is equally balanced regardless of body position
3) Both A and B
4) None of the above
Both A and B
(Intersection of the 3 cardinal planes) & (The point around which a body’s weight is equally balanced regardless of body position)
Which of the following types of force act parallel to a surface?
Question options:
1) Compression
2) Shear
3) Tension
4) All of the above
Shear
Scalar quantities and vector quantities have which of the following properties in common?
Question options:
1) Magnitude
2) Direction
3) Both A and B
4) None of the above
Magnitude
Which of the following statements is true?
Question options:
1) Pressure is synonymous with weight.
2) Pressure is synonymous with force.
3) Force is always a weight.
4) Weight is always a force.
Weight is always a force.
Which of the following statements is/are true regarding density?
Question options:
1) Muscle tissue is more dense than fat tissue.
2) Specific weight is proportional to density.
3) Both A and B
4) None of the above
Both A and B
(Muscle tissue is more dense than fat tissue) & (Specific weight is proportional to density)
Which of the following is a correct unit of pressure?
Question options:
1) slugs
2) kg/cm^2
3) Newtons
4) N/cm^2
N/cm^2
Which of the following types of force exerts a pull on the body as in muscle contraction?
Question options:
1) Compression
2) Shear
3) Tension
4) All of the above
Tension
In a free body diagram of the human body, which direction would the vector representing weight of the body point?
Question options:
1) Down
2) Depends on body orientation
3) Up
4) Not possible to determine
Down
Which of the following quantities is calculated the same as pressure?
Question options:
1) Shear
2) Strain
3) Tension
4) Stress
Stress
Which of the following is NOT true about weight?
Question options:
1) Measurement unit = kg
2) Weight is a force
3) Changes depending on gravity
4) Measurement unit = kg m s^-2
Measurement unit = kg
Which of the following characteristics of a vector represents magnitude?
Question options:
1) Its angle of orientation
2) Its direction
3) Its length
4) All of the above
Its length
Which of the following is a scalar quantity?
Question options:
1) Force
2) Mass
3) Velocity
4) All of the above
Mass
When injury results from a single large force application, such as a tackle, the injury is usually termed what?
Question options:
1) Acute
2) Chronic
3) Repetitive
4) All of the above
Acute
Stress fractures result from which of the following types of loading?
Question options:
1) Acute loading
2) Repetitive loading
3) Both A and B
4) None of the above
Repetitive loading
A bending load will produce which of the following types of stress?
Question options:
1) Torsion
2) Tension
3) Both compression and tension
4) Compression
Both compression and tension
Which of the following statements is/are true?
Question options:
1) Increasing the surface area over which a force is distributed increases the amount of stress acting on the surface.
2) Decreasing the surface area over which a force is distributed increases the amount of stress acting on the surface.
3) Both A and B
4) None of the above
Decreasing the surface area over which a force is distributed increases the amount of stress acting on the surface.
Which of the following occurs when a bone is caused to twist about the longitudinal axis?
Question options:
1) Compression
2) Tension
3) Torsion
4) None of the above
Torsion
The formula for torque includes force and which other variable?
Question options:
1) Force arm
2) Moment arm
3) Perpendicular distance from the axis of rotation
4) All of the above
All of the above
(Force arm) , (Moment arm) , (Perpendicular distance from the axis of rotation)
When muscles on opposite sides of a joint develop tension, which determines the direction of joint movement?
Question options:
1) Muscle flexibility
2) Muscle strength
3) Net torque
4) None of the above
Net torque
The “quantity of matter composing a body” defines which of the following?
Question options:
1) Inertia
2) Weight
3) Momentum
4) Mass
Mass
Which of the following relationships is correct?
Question options:
1) a = m / F
2) F = m / a
3) m = F / a
4) None of the relationships is correct.
m = F / a
Inertia is directly proportional to which quantity(s)?
Question options:
1) Acceleration
2) Force
3) Mass
4) All of the above
Mass
In a free body diagram of the human body, where would the vector representing weight of the body originate?
Question options:
1) Need more information
2) Center of gravity
3) Contact between the feet and the ground
4) Head
Center of gravity
Which of the following is true regarding electromyography?
Question options:
1) Measures the electrical activity produced by a muscle
2) Treats muscle injury with electrical impulses
3) Both A and B
4) None of the above
Measures the electrical activity produced by a muscle
Which of the following types of force exerts a squeezing effect on the body?
Question options:
1) Compression
2) Shear
3) Tension
4) All of the above
Compression
Which of the following statements is/are true regarding vector algebra?
Question options:
1) In vector resolution, when a vector is resolved into two components, they are always perpendicular.
2) In vector composition, only perpendicular components can be composed into a resultant.
3) Both A and B
4) None of the above
In vector resolution, when a vector is resolved into two components, they are always perpendicular.
