KHP 415 Final Exam (UKY)

Vector mechanics apply to which of the following?

Displacement & Velocity

If velocity is constant, then acceleration is what?

zero

The Greek letter delta is used to represent what?

Change in

Linear distance traveled per unit of time describes what?

speed

A runner completes 1 full lap around a 400 meter track. What is her displacement?

Zero (as long as turn back around corner)

A runner moving at velocity of 6 m/s inc. the velocity in a 2s time interval to a rate of 10 m/s. what is the rate of acceleration?

(10-6)/2 = 2m/s

When final v is larger than initial velocity the acceleration is what?

Positive

Marion Jones changes her velocity from 8m/s to 11 m/s. Gail Devers changes velocity from 7 m/s to 10 m/s. Who has the greater acceleration?

need more information; a=(V2-V1)/(T2-T1)

Once a projectile is airborne, it is affected by which of the following?

Both Gravity & Air Resistance

A ball rolling across a field with an acceleration of -0.5 m/s^2 rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball's initial speed?

(0-v1)/8s=-.5m/s^2= 4

Which of the following affects the time that a horizontally projected object remains in the air?

Projection height; if zero probably ball rolling on the ground, angle, and velocity

Which of the following statements is true regarding objects projected from the same level as they land?

angle of decent is equal to angle of take off & takes same time up & down

A ball is tossed vertically upward from. A height of 2m w/ initial velocity of 10 m/s. Just before the ball hits the ground its velocity will be what?

greater than 10 m/s

Ball is tossed vertically upward from a height with an initial velocity of 10 m/s at an angle of 30 degrees. Neglecting air resistance, what is the speed of the ball at landing?

10 m/s

The meter is the unit of measurement for which of the following?

Distance & Displacement

The negative sign in front of acceleration due to gravity (-9.8) can mean which of the following?

the projectile is traveling both down and speeding up and traveling up and slowing down

Which of the following components of projectile is affected by gravity?

Vertical Component

Which of the following components of projectile is affected by gravity?

Highest Point, Vertical Velocity 0, & Direction changes

Neglecting the effect of air resistance, which of the following is/are true regarding horizontal component of projectile velocity?

remains constant throughout flight

Why do elite long jumpers have take off angles far less than optimal 45 degrees?

take-off velocity is higher during lower take-off angles

Biomechanics

the study of the mechanical aspects of biological organisms

Which of the following would not be measured in a kinematic analysis of a tennis serve?

 

angular velocity

 

angular acceleration

 

muscular force

 

linear velocity

Muscular force

Example of Kinetic consideration

Both muscle force producing a vertical jump and the impact force landing from a jump

Example of static situation

Both cyclist riding at a constant velocity and a person balancing motionless on one foot

Which of the following is associated with kinematics?

Displacement

Which of the following included in sports medicine?

Both scientific aspects and clinical aspects of exercise and sport

Which of the following is scalar?

Mass, speed, distance

Qualitative analysis

Not numerical

Pioneer that first uses anatomical drawings illustrating mechanical principle is?

Giovani Borelli

Biomedical research contributed to:

Injury prevention, enhanced sport performance, and equipment production

Which of the following is NOT an example of a sagittal plane movement?

Lateral Flexion

Movements in transverse plane occur around which axis

Longitudinal

Which plane does elbow extension occur?

sagittal

Which axis does abduction occur?

anteroposterior

Which of the following is false?

Hip is distal to the knee

Human movement falls under:

General motion

options that occur in the sagittal plane?

Running

Motions that occur in the frontal plane?

Cartwheel

Abduction occurs in what plane?

Frontal

Which plane does swinging a bat occur?

Transverse

Transverse plane movement at the shoulder:

Both horizontal abduction and medial rotation

Examples of superficial muscles:

Biceps, triceps, & gastrocnemius

Describe Knee Joint relative to ankle joint:

Proximal

Describe the bicep muscle:

Anterior

What is true regarding anatomical reference position?

Palms face forward, erect position, starting position for describing motion

Foot pronation occurs at which joint?

Subtalar

Internal rotation synonym:

Medial Rotation

Anatomical position, forearm in what position?

Supinated

True regarding circumduction?

Combines flexion, extension, adduction, and abduction

True regarding Cartesian coordinate system

Special reference system used by biomechanics and can be used to describe two dimensional and three dimensional motion

Vector mechanics apply to which of the following

Displacement and velocity NOT SPEED

Velocity is constant acceleration is....

Zero

Greek triangle(delta) represents

Change in

Linear distance traveled per unit of time represents

Velocity

A runner completes 1 full lap around a 400 meter track. Whats her displacement

Zero

Runner moving at a velocity of 6 m/s increases the velocity in a 2s time interval to a rate of 10 m/s what is rate of acceleration

2 m/s^2

When final velocity is larger Thant initial velocity, acceleration is what?

Positive

Jones changes velocity from 8 m/s to 11 m/s. Devers changes hers from 7 m/s to 10 m/s. Who has higher acceleration?

need more info

Once a projectile is airborne, it is affected by which of the following

Both gravity & air resistance

A ball rolling across a field with an acceleration of -.5 m/s^2 rolls 12.5 m and then comes to a stop after 8 secs. Whats the balls initial speed?

4 m/s

Which of the following affects the time that a horizontally projected object remains in the air?

Projection Height

Which of the following statements is true regarding objects proceed from the same level as they land?

Time up & time down are equal; & angle of deceit is equal to angle of takeoff

A ball is tossed vertically upward from a height of 2 m with an initial velocity of 10 m/s. Just before the ball hits the ground its velocity will be what?

Greater than 10 m/s

A ball is kicked with an initial velocity of 10 m/s at an angle of 30 degrees. Neglecting air resistance what is speed of the ball at landing

10 m/s (Because it is the mirror image therefore it will land at the same)

Meter is the unit of measurement from while of the following:

Distance & Displacement

The negative sign in front of acceleration due to gravity can mean which of the following

Projective is both traveling down and speeding up and traveling up and slowing down

Which of the following components of projectile is affected by gravity

Vertical Component

Which of the following is/are true regarding apex in trajectory of a projectile

Highest point in flight, velocity is 0, & direction changes

Neglecting effect of air resistance which of following are true regarding horizontal component of projectile velocity

Remains constant

Why do elite long jumpers have take off angles far less than optimal 45 degrees

Take off velocity is higher during lower take off angles

An angle formed by a body segment with respect to horizontal is what?

Absolute Angle

If angular acceleration is constant, the angular velocity must be?

Increasing & decreasing

The component of angular acceleration directed towards the center of curvature defines what?

radial Acceleration

What quantity will have the following units?

Angular Velocity

If the angular velocity of a batters shoulders increases, what will happen to the linear velocity of the end of the bat?

Increase

Which of the following terms describes the location of the center of rotational a given instant time?

Instant Center

Which of the following terms describers the angle formed between longitude axes of two

Relative Angle

Which angular direction is conventionally regarded as positive?

Counterclockwise

Which of the following is/are true regarding a radian?

it is equal to 57.3; it I the size of the angle subtended by an arc of radius length; & it is. aunt of angular displacement

Which of the following is NOT a valid unit of angular velocity?

Gradients

During a baseball hutch, a pitchers arm rotates through 80 degrees of motion at the shoulders. If this is accomplished in .5 seconds which of the following is true?

Angular velocity is NOT constant & Angular acceleration is NOT constant

Which of the following is a scalar quantity?

angular distance

Range of motion at a joint is a measurement of what?

Angular displacement

Which of the following quanitites are equal?

2 (pi) radians and 360 degrees; & 270 degrees and 3/4 equal

When the second hand in a clock makes a compete revolution, which of the following is/are true?

a. Angular distance is 360 degrees

b. Angular displacement is 0 degrees

If the knee joint goes through 100 degrees of flexion during the down phase of a squat, what is the tail angular distance during 10 compete squats?

2000 degrees

Which of the following is/are units for angular speed?

a. Rpm

b. Deg/s

c. Rad/s

What rules have to be followed when using the formula v=r(w)

a. Units need to be in radians

b. Units agreed upon

Maximizing tangential acceleration is important in which of the following situations

a. Punting a football for distance

b. Severing a tennis ball

Radial acceleration is directly affected by which of the following?

Both tangential velocity & radius of rotation

Which of the following quantities would be different on the moon than on earth?

Acceleration due to gravity

Which of the following relationships is correct?

M=f/a (b/c F=ma)

What determines the time a horizontally projected object remains in the air?

Projection Height

If an object of constant mass travels with a constant velocity, which statement is true?

Both momentum is constant and acceleration is 0

A skater gliding on ice will continue to move in the same direction and with the same speed (in the absence of the action of additional forces). This exemplifies which of the following laws?

Newtown's first law of inertia

A 500N gymnast performing a giant swing w/ angular velocity of 5 rad/sec exerts 90Nm of torque on the support bar. How much does the bar exert on the hands?

90 nm

higher the jump....

Law of action/reaction

Which quantity is not a force?

Mass

The principle of conservation of momentum restates which Newton's laws?

Inertia

Which of the following mechanical quantities is not dependent on time?

Work