Deck 10: Linear Kinematics of Human Movement

Question 1

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

Answer 1

zero

Question 2

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

Answer 2

the instantaneous velocity of the jumper at takeoff

Question 3

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

Answer 3

both distance and displacement

Question 4

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

Question 5

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

Question 6

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

A)time
B)displacement
C)distance
D)change in

Question 7

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

Question 8

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

Question 9

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

Question 10

What quantity is calculated as the inverse of speed?

A)velocity
B)acceleration
C)pace
D)none of these answers is correct

Question 11

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

Question 12

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

Question 13

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

Question 14

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

Question 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

Question 16

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

A)distance
B)speed
C)displacement
D)both distance and speed

Question 17

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

Question 18

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

Question 19

If velocity is constant,then acceleration is what?

A)zero
B)constant,but not necessarily zero
C)changing
D)need more information

Question 20

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

Question 21

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

Question 22

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

A)projection speed
B)range
C)relative projection height
D)trajectory

Question 23

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

A)instantaneous
B)kilogram
C)kinematics
D)kinetics

Question 24

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

Question 25

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

Question 26

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

Question 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

Question 28

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

Question 29

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

A)initial velocity
B)instantaneous
C)kilogram
D)kinematics

Question 30

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

Question 31

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

Question 32

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

A)projection speed
B)range
C)relative projection height
D)trajectory

Question 33

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

A)initial velocity
B)linear acceleration
C)linear displacement
D)linear velocity

Question 34

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

Question 35

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

Question 36

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

Question 37

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

Question 38

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

Question 39

If acceleration is constant and positive,velocity is what?

A)zero
B)increasing
C)decreasing
D)need more information

Question 40

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

A)meter
B)projectile
C)projection speed
D)range

Question 41

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

Question 42

Toddlers exhibit more kinematic variability than adults during walking.

Question 43

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

Question 44

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

Question 45

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