Chapter 10- Kinematics

Question 1

Define kinematics

Answer 1

-the pattern or sequencing of movement with respect to time
-the appearance of a motion
-visually observable aspects of technique or form

Question 2

Kinematics is also referred to as…

Answer 2

Form or Technique

Question 3

Scalar vs Vector

Answer 3

Scalar- one direction
Vector- more than one direction
Both have magnitude

Question 4

What is Linear Displacement?

Answer 4

-Change in location
-Vector equivalent of linear distance
-Measured in units of cm, m, km

Question 5

What is Linear Speed?

Answer 5

-Distance covered over the time taken
-Speed = Distance/Change in Time
-Measured in units of m/s
-A scalar quantity

Question 6

Running Speed is the product of what?

Answer 6

Stride length and Stride frequency

Question 7

What is Linear Velocity?

Answer 7

-Rate of change in location
-Velocity = Displacement/Time
-Vector equivalent of linear speed
-Measured in units of m/s or km/hr

Question 8

Expand on the Human Gait

Answer 8

-Speed is the product of stride length and stride frequency
-Adults, when hurrying, will increase both length and frequency
-Most runners use a length and stride frequency that minimizes the physiological cost of running.
-Fatigue tends to increase stride frequency while reducing stride length

Question 9

What is Acceleration?

Answer 9

-Rate of change in linear velocity
-Acceleration = Change in Velocity/Time
-a = (v2-v1)/t
-Measured in units of m/s2

Question 10

Acceleration can be what (3), based on what (2)

Answer 10

-Positive, negative, and zero
-Direction of motion and the direction of the change in velocity

Question 11

What is a projectile?

Answer 11

A body in free fall that is subject only to the forces of gravity and air resistance

Question 12

Why do we analyze the horizontal and vertical components of projectile motion separately?

Answer 12

The vertical component is influenced by gravity and the horizontal component is not

Question 13

What is the effect of gravity?

Answer 13

The force of gravity produces a constant acceleration of -9.81 m/s2 on bodies near the surface of the earth

Question 14

Vertical velocity BLANK as the ball BLANK and BLANK as the ball BLANK due to the influence of gravitational force.

Answer 14

Decreases
Rises
Increases
Falls

Question 15

The pattern of change in the vertical velocity of a projectile is…

Answer 15

Symmetrical about the apex

Question 16

What factors influence the trajectory (flight path) of a projectile?

Answer 16

-Angle: the direction of projection with respect to the horizontal
-Speed: the magnitude of projection velocity
-Height - the difference between projection height and landing height

Question 17

The horizontal velocity is constant. Therefore, horizontal acceleration is
Equal to…

Answer 17

Zero

Question 18

The BLANK BLANK of the shot at the moment of release primarily determines the ultimate horizontal displacement of the shot.

Answer 18

Instantaneous velocity

Question 19

Factors influencing projectile motion (neglecting air resistance)

Answer 19

-Flight Time: initial vertical velocity; relative projection height
-Horizontal Displacement: horizontal velocity; relative projection height
-Vertical Displacement: initial vertical velocity; relative projection height
-Trajectory: initial speed; projection angle; relative projection height