Ch10 Linear Kinematics of Human Movement Verified Test Bank

Basic Biomechanics, 8e (Hall)

Chapter 10 Linear Kinematics of Human Movement

1) If velocity is constant, then acceleration is what?

A) zero

B) constant, but not necessarily zero

C) changing

D) need more information

2) The Greek letter Δ (delta) is used to represent what?

A) time

B) displacement

C) distance

D) change in

3) In sport, which measure is more important or relevant?

A) distance

B) displacement

C) depends on the situation

D) none of these answers is correct

4) Which of the following is/are scalar quantity(ies)?

A) distance

B) speed

C) displacement

D) both distance and speed

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

A) 400 meters

B) 400 meters × 2π

C) zero

D) need more information

6) 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

7) 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

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

A) gravity

B) air resistance

C) release velocity

D) both gravity and air resistance

E) all of these answers are correct

9) 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

10) 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

11) 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 badminton shuttlecock during flight and a long jumper while in the air

D) none of these answers is correct

12) 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 these answers are correct

13) 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

14) 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

15) 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

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

A) distance

B) displacement

C) speed

D) both distance and displacement

E) all of these answers are correct

17) Why does running downhill tend to increase running speed?

A) increased stride length

B) increased stride frequency

C) both increased stride length and increased stride frequency

D) none of these answers is correct

18) What quantity is calculated as the inverse of speed?

A) velocity

B) acceleration

C) pace

D) none of these answers is correct

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

A) vertical component

B) horizontal component

C) both vertical component and horizontal component

D) depends on the individual situation

20) 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 it is the highest point in the flight and vertical velocity is 0

E) all of these answers are correct

21) 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 remains constant throughout flight and changes according to gravitational acceleration

22) 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 angle of projection and air resistance

E) all of these answers are correct

23) 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 take-off velocity is higher during lower take-off angles and relative take-off height is zero

D) none of these answers is correct

24) 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

25) 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

26) If acceleration is constant and positive, velocity is what?

A) zero

B) increasing

C) decreasing

D) need more information

27) In which track event is distance equal to displacement?

A) 400 m dash

B) 200 m dash

C) 100 m dash

D) 5K road race where starting line = finish line

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

A) weight of projectile

B) mass of projectile

C) projection height

D) all of these answers are correct

29) Choose the term that describes the form, pattern, or sequencing of movement with respect to time.

A) instantaneous

B) kilogram

C) kinematics

D) kinetics

30) Choose the term that describes the most common international unit of length.

A) meter

B) projectile

C) projection speed

D) range

31) Choose the term that describes the change in location, or the directed distance from initial to final location.

A) laws of constant acceleration

B) linear acceleration

C) linear displacement

D) linear velocity

32) Choose the term that describes the rate of change in location.

A) initial velocity

B) linear acceleration

C) linear displacement

D) linear velocity

33) Choose the term that describes "occurring during a small interval of time."

A) initial velocity

B) instantaneous

C) kilogram

D) kinematics

34) Choose the term that describes the body in free fall that is subject only to the forces of gravity and air resistance.

A) meter

B) projectile

C) projection speed

D) range

35) Choose the term that describes the highest point in the trajectory of a projectile.

A) angle of projection

B) apex

C) average

D) initial velocity

36) Choose the term that describes the flight path of a projectile.

A) projection speed

B) range

C) relative projection height

D) trajectory

37) Choose the term that describes the direction at which a body is projected with respect to the horizontal.

A) angle of projection

B) apex

C) average

D) initial velocity

38) Choose the term that describes the horizontal displacement of a projectile at landing.

A) projection speed

B) range

C) relative projection height

D) trajectory

39) A ________ is a body in free fall subject only to the forces of ________ and ________ ________.

40) The highest point in the trajectory of a projectile is the ________.

41) In the absence of air resistance, the horizontal acceleration of a projectile is always equal to ________.

42) The form, pattern, or sequencing of movement with respect to time defines ________.

43) Provide 2 examples in sport or rehab where instantaneous velocity is more important than average velocity and 2 examples where average velocity is more important. Provide rationale.

44) Discuss the 3 mechanical factors that influence a projectile, including how a change in one will affect the others.

45) Explain the differences between scalar and vector quantities using examples of each.

46) Define velocity and acceleration, include the formulas for each and explain the relationship between the two by providing examples.

47) Explain why the vertical and horizontal components of a projectile are analyzed separately, including the effect of gravity and air resistance on each.

48) Provide relative values for velocity and acceleration, both vertical and horizontal, during the flight of a projectile.

49) The vertical acceleration graph of a ball tossed into the air will follow a parabolic path.

50) If air resistance is disregarded, the horizontal component of a projectile is constant.

51) Toddlers exhibit more kinematic variability than adults during walking.

52) At the apex of the trajectory of a projectile, vertical velocity is at its maximum.