# BioMechanics Questions

D. Both A and B
Vector mechanics apply to which of the following?
A. displacement
B.velocity
C.speed
D.both A and B
E.all of the above
A. zero
IF velocity is constant, then acceleration is what?

A. Zero
B. constant, but not necessarily zero
C. changing

We will write a custom essay sample on
BioMechanics Questions
or any similar topic only for you
D. Change in
The Greek letter Δ (delta) is used to represent what?

A. Time
B. Displacement
C.Distance
D. Change in

D. Speed
Linear distance traveled per unit of time describes what?

A. Displacement
B. Velocity
C. Acceleration
D. Speed

D. Force
Which of the following is NOT a kinematic quantity?

A. Distance
B. Displacement
C. Acceleration
D. Force

C. Depends on the situation
In sport, which measure is more important or relevant?

A. Distance
B. Displacement
C. Depends on the situation
D. None of the above are important

D. Both A and B
Which of the following is/are scalar quantity(ies)?

A. Distance
B. Speed
C. Displacement
D. Both A and B

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

A. 400 meters
B.400 meters X 2π
C. Zero

C. 2 m/s2
A runner moving at a velocity of 6 m/s increases the velocity in a 2 s time interval to a rate of 10 m/s. What is the rate of acceleration?

A. 4 m/s2
B. 4 m/s
C. 2 m/s2
D. – 2 m/s2

C. Positive
When final velocity is larger than initial velocity, the acceleration is what?

A. Zero
B. Negative
C. Positive
D. Average

A. Distance
In a 5K road race, the finish line is also the starting line. What does 5K represent?

A. Distance
B. Displacement
C. Speed
D. Velocity

B. Stride frequency
What factor(s) distinguishes elite sprinters from non-elite performers?

A. Stride length
B. Stride frequency
C. Both A and B
D. None of the above

D. Both A and B
Once a projectile is airborne, it is affected by which of the following?
A. gravity
B. Air resistance
C. Release Velocity
D. Both A and B
E. All of the above
D. it cannot be determined from the information given
It takes a swimmer 1 hour to cross a lake that is 1/2 mile wide. What is true of the swimmer’s acceleration?

A. it is 1/2 mi/hr
B. it is 1 mi/hr
C. it is equal to velocity squared
D. it cannot be determined from the information given

B. It is negative
If the velocity of a sailboat changes from 4 m/s to 2 m/s over a period of time, what is true of the sailboat’s acceleration?

A. it is positive
B. it is negative
C. it is equal to zero
D. it is equal to 2 knots/hr

A. 4 m/s
A ball rolling across a field with an acceleration of -0.5 m/s2 rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball’s initial speed?
A. 4 m/s
B. 16 m/s
C. 12.5 m/s
D. 6.25 m/s
C. Both A and B
Which of the following is an example of projectile motion?
A. a badminton shuttlecock during flight
B. a long jumper while in the air
C. both A & B
D. none of the above
C. Projection height
Which of the following affects the time that a horizontally projected object remains in the air?
A. weight
B. mass
C. projection height
D. all of the above
C. Both A and B
Which of the following statements is true regarding objects projected from the same level as they land?
A .time up and time down are equal
B. angle of decent is equal to angle of takeoff
C. both A & B
D. all of the above
What is the average velocity of a cyclist who covers 5 miles in 30 minutes?
A. 5 mi/hr
B. 10 mi/hr
C. 30 mi/hr
D. 60 mi./hr
B. The instantaneous velocity of the jumper at takeoff.
When a long jump performance is analyzed, which of the following is likely to be of the most interest?
A. the average velocity of the jumper during the run-up
B. the instantaneous velocity of the jumper at takeoff
C. the average velocity of the jumper during the flight
D. the instantaneous velocity of the jumper at landing
C. Initial speed of projection
Which of the following factors typically exerts the most influence on the horizontal displacement obtained by a projectile?
A. projection angle
B. relative height of projection
C. initial speed of projection
D. initial acceleration of projection
C. Greater than 10 m/s
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?
A. 10 m/s
B. less than 10 m/s
C. greater than 10 m/s
D. not possible to predict
A. 10 m/s
A ball is kicked with an initial velocity of 10 m/s at an angle of 30°. Neglecting air resistance, what is the speed of the ball at landing?
A. 10 m/s
B. 10 m/s multiplied by the sine of 30 degrees
C. 10 m/s multiplied by the cosine of 30 degrees
D. none of the above
E. All of the above
Which of the following is/are used to indicate direction of displacement?
A. positive
B. negative
C. North
D. both A and B
E. all of the above
D. Both A and B
The meter is the unit of measurement for which of the following?
A. distance
B. displacement
C. speed
D. both A and B
E. all of the above
A. Stride or cycle length
What factor(s) distinguishes elite cross-country skiers from non-elite performers?
A. stride or cycle length
B. stride or cycle frequency
C. both A & B
D. none of the above
A. Increased stride length
Why does running downhill tend to increase running speed?
A. increased stride length
B. increased stride frequency
C. both A and B
D. none of the above
C. Pace
What quantity is calculated as the inverse of speed?
A. velocity
B. acceleration
C. pace
D. none of the above
C. Both A and B
The negative sign in front of the acceleration due to gravity (-9.81 m/s2) can mean which of the following?
A. the projectile is traveling down and speeding up (negative direction)
B. the projectile is traveling up and slowing down (negative acceleration)
C. both A and B
D. none of the above
A. Vertical Component
Which of the following components of projectile is affected by gravity?
A. vertical component
B. horizontal component
C. both A and B
D. depends on the individual situation
E. Al of the above
Which of the following is/are true regarding the apex in the trajectory of a projectile?
A. it is the highest point in the flight
B. vertical velocity is 0
C. direction changes
D. both A and B
E. all of the above
A. Remains constant throughout flight
Neglecting the effect of air resistance, which of the following is/are true regarding the horizontal component of projectile velocity?
A. remains constant throughout flight
B. changes according to gravitational acceleration
C. equal to 0
D. both A and B
D. Both A and B
The shape of a projectile’s trajectory is influenced by which of the following?
A. angle of projection
B. air resistance
C. speed of projection
D. both A and B
E. all of the above
A. Take-off velocity is higher during lower take-off angles
Why do elite long jumpers have take-off angles far less than the optimal 45°?
A. take-off velocity is higher during lower take-off angles
B. relative take-off height is zero
C. both A and B
D. none of the above
A. -9.81 m/s2
Which of the following represents vertical acceleration of a projectile?
A. -9.81 m/s2
B. -9.81 m/s
C. 0 m/s2
D. 0 m/s
C. 0 m/s2
Which of the following represents horizontal acceleration of a projectile?
A. -9.81 m/s2
B. -9.81 m/s
C. 0 m/s2
D. 0 m/s
D. Both A and B
The laws of constant acceleration can be applied to which of the following?
A. horizontal component of projectile motion
B. vertical component of projectile motion
C. resultant of projectile motion
D. both A and B
E. all of the above
B. Acceleration=0
In the formula v2 = v1, what is know about acceleration?
A. acceleration = -9.81 m/s2
B. acceleration = 0
C. both A and B
B. Absolute angle
An angle formed by a body segment with respect to horizontal is what?
A. relative angle
B. absolute angle
C. acute angle
D. none of the above
B. decrease
If all other factors are held constant, what effect would “choking up” on a bat have on the resultant linear velocity of a hit ball?
A. increase
B. decrease
C. remain the same
B increasing or decreasing
If angular acceleration is constant, then angular velocity must be
A. constant
B. increasing or decreasing
C. equal to zero
D. none of the above
The component of angular acceleration directed toward the center of curvature defines what?
B. tangential acceleration
C. angular acceleration
D. linear acceleration
D. angular velocity
What quantity will have the following units? rad/s
A. linear displacement
B. angular displacement
C. linear velocity
D. angular velocity
A. Increase
If the angular velocity of a batter’s shoulders increases, what will happen to the linear velocity of the end of the bat?
A. increase
B. decrease
C. stay the same
D. end of the bat has no linear velocity
C. Instant center
Which of the following terms describes the location of the center of rotation at a joint at a given instant in time?
A. precise center
B. exact center
C. instant center
D. none of the above
B. The relative angle
Which of the following terms describes the angle formed between the longitudinal axes of two adjacent body segments?
A. the static angle
B. the relative angle
C. the absolute angle
D. none of the above
B. counterclockwise
Which angular direction is conventionally regarded as positive?
A. clockwise
B. counterclockwise
C. flexion
D. extension
D. All of the above are true
Which of the following is/are true regarding a radian?
A. it is equal to 57.3 degrees
B. it is the size of the angle subtended by an arc of radius length
C. it is a unit of angular displacement
D. all of the above are true
C. Both A and B
Which of the following expressions defines angular velocity?
A. change in angular position over a given time
B. angular displacement divided by time
C.both A and B
D.neither A nor B
Which of the following is not a valid unit of angular velocity?
B. revolutions per minute
C. degrees per hour
D. Neither A nor B must be true
During a baseball pitch, a pitcher’s arm rotates through 80 degrees of motion at the shoulder. If this is accomplished in 0.5 seconds, which of the following statements is true?
A. angular velocity is constant
B. angular acceleration is constant
C. both A and B must be true
D. neither A nor B must be true
C. Both A and B
Which of the following is/are vector quantity(s)?
A. angular velocity
B. angular acceleration
C. both A and B
D. neither A nor B
A. Angular distance
Which of the following are scalar quantities?
A. angular distance
B. angular velocity
C. both A and B
D. neither A nor B
D. None of the above
If angular acceleration is constant, which of the following is true of angular velocity?
A. it must be constant
B. it must be equal to zero
C. it must be increasing
D. none of the above
A. it will increase
A model airplane is being flown at the end of a cord 20 feet long. If the speed of the airplane remains constant, but the cord is shortened to 15 feet, what will be the effect on the radial acceleration of the airplane?
A. it will increase
B. it will decrease
C. it will remain the same
D. one must know the weight of the airplane in order to answer the question
B. Angular displacement
Range of motion at a joint is a measurement of what?
A. linear displacement
B. angular displacement
C. linear velocity
D. angular velocity
D. All of the above
Human body angles may be calculated using which of the following?
A. goniometer
B. flexometer
C. electrogoniometer
D. all of the above
C. both A and B
Which of the following quantities are equal?
B. 270° and 3/4 revolution
C. both A & B
D. none of the above
A. Absolute angle of truck
When observing someone lift a heavy object, which of the following is likely to be the angle of interest regarding back injury?
A. absolute angle of the trunk
B. relative angle of the trunk
C. absolute angle of the knee
D. relative angle of the knee
E. All of the above
Why is anatomical knowledge important when using a goniometer?
A. location of joint center determines placement of axis
B. bone location affects position of the goniometer arms
C. instant center of a joint can change during movement
D. both A and B
E. all of the above
D. Both A and B
When the second hand on a clock makes a complete revolution, which of the following is/are true?
A. angular distance is 360°
B. angular displacement is 0°
C. angular velocity is 6 deg/s
D. both A and B
E. all of the above
B. 2000°
If the knee joint goes through 100° of flexion during the down phase of a squat, what is the total angular distance during 10 complete squats?
A. 1000°
B. 2000°
C. 0°
D. none of the above
C. 0°
A quadruple axel (in figure skating) involves how much angular displacement?
A. 4 revolutions
B. 1440°
C. 0°
D. none of the above
C. ω = θ/t
Which of the following is a correct formula for angular velocity?
A. σ = φ/t
B. ω = φ/t
C. ω = θ/t
D. σ = θ/t
E. All of the above
Which of the following is/are correct units for angular speed?
A. rpm
B. deg/s
D. both A and B
E. all of the above
D. 0
What is the angular acceleration of the second hand on a clock after one complete revolution?
A. 6 deg/s2
B. 6 deg/s
C. 60 deg/s2
D. 0
A. right hand rule
A procedure for identifying the direction of an angular motion vector is called what?
A. right hand rule
B. clockwise rule
C. both A and B
D. no special procedure is needed
What does the letter “r” stand for in the equation v = rω?
A. resultant
D. none of the above
C. Both A and B
What rules have to be followed when using the formula v = rω?
A. units for ω have to be radian-based
B. units for v and r must the same base units (with time included in “v”)
C. both A and B
D. there are no special rules
B. linear and angular velocity
The formula v = rω establishes the relationship between what?
A. linear and angular displacement
B. linear and angular velocity
C. linear displacement and linear velocity
D. angular displacement and angular velocity
C. Both A and B
Which of the following is/are formula(s) for tangential acceleration?
A. at = (vt – vt)/t
B. at = rα
C. both A and B
D. none of the above
????????
D. Both A and B
Maximizing tangential acceleration is important in which of the following situations?
A. punting a football for distance
B. serving a tennis ball
C. throwing a dart
D. both A and B
E. all of the above
What component of angular acceleration represents the rate of change in direction of a rotation body?
A. tangential acceleration
C. linear acceleration
D. none of the above
C. When converting between linear and angular velocity
A. when measuring linear velocity
B. when measuring angular velocity
C. when converting between linear and angular velocity
D. all of the above
C. Both A and B
Which of the following can contribute to the resultant linear velocity of a projectile at release?
A. tangential acceleration
C. both A and B
D. none of the above
D. m/s2
Which of the following are appropriate units for tangential acceleration?
B. m/s
D. m/s2
C. Both A and B
Radial acceleration is directly affected by which of the following?
A. tangential velocity
C. both A and B
D. none of the above
D. 0
When angular velocity is 0, what is angular acceleration?
A. -9.81 m/s2
B. increasing
C. decreasing
D. 0
A. Acceleration due to gravity
Which of the following quantities would be different on the moon than on the earth?
A. acceleration due to gravity
B. mass
C. both mass and acceleration
D. neither mass nor acceleration
A. m=F/a
Which of the following relationships is correct?

A. m = F / a
B. F = m / a
C. a = m / F
D. none of the above

C. Projection height
What determines the time a horizontally projected object remains in the air?
A. weight
B. mass
C. projection height
D. all of the above
C. Both A and B
If an object of constant mass travels with a constant velocity, which statement is true?
A. momentum is constant
B. acceleration is 0
C. both A & B
D. none of the above
A. Newtons first law of inertia
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?
A. Newton’s first law of inertia
B. Newton’s second law of acceleration
C. Newton’s third law of action/reaction
D. Newton’s law of gravitational force
D. 90 Nm
A 500N gymnast performing a giant swing with an angular velocity of 5 rad/sec, exerts 90 Nm of torque on the support bar. How much torque is exerted by the bar on the gymnast’s hands?
A. 100 Nm
B. 2500 Nm
C. 590 Nm
D. 90 Nm
D. the law of action/reaction
The higher the jump, the “harder” the landing. This statement reflects which of the following laws?
A. the law of inertia
B. the law of momentum
C. the law of torque
D. the law of action/reaction
B. mass
Which quantity is NOT a force?
A. friction
B. mass
C. weight
D. gravity
B. velocity and mass
The 2 variables that determine momentum are
A. velocity and time
B. velocity and mass
C. mass and acceleration
D. velocity and acceleration
D. depends on the situation
In sporting activities, what amount of friction is desired?
A. large
B. small
C. none
D. depends on the situation
C. momentum
What variable may be described as “the quantity of motion” possessed by an object?
A. force
B. inertia
C. momentum
D. velocity
A. inertia
The principle of conservation of momentum restates which of Newton’s laws?
A. inertia
B. acceleration
C. action/reaction
D. gravitation
A. work
Which of the following mechanical quantities is NOT dependent on time?
A. work
B. power
C. kinetic energy
D. velocity
Which of the following correctly describes impact?
A. large force applied over a long period of time
B. large force applied over a short period of time
O C.
small force applied over a long period of time
O D.
small force applied over a short period of time

#### New Essays

×

Hi there, would you like to get such a paper? How about receiving a customized one? Check it out