Chapter 4 - Linear Kinematics

Question 1

What is Kinematics?

Answer 1

• The pattern or sequencing of movement wrt time
• The appearance of motion
• Visually observable aspects of technique or form

Question 2

What is Linear Displacement?

Answer 2

The distance between initial and final location (Change in location)

Question 3

What is Linear Speed?

Answer 3

Distance covered over a period of time.

Hence, Speed = Distance / Time

Question 4

What affects your Running Speed?

Answer 4

1) Stride Length
2) Stride Frequency

Question 5

What is Linear Velocity?

Answer 5

• The rate of change in location
• Hence, Velocity = Displacement / Time

Has Direction

Question 6

What is Acceleration?

Answer 6

• The rate of change in linear velocity
• Hence, Acceleration = Change in velocity / Time
  or (Acceleration = v2-v1 / Time)

Question 7

Can Acceleration be negative and positive?

Answer 7

Yes, Depending on the direction

Question 8

What is a Projectile?

Answer 8

• A body in free fall that is subjected only to the forces of gravity and air resistance.
• Vertical component influenced by gravity while horizontal component is not

Question 9

What is the effect of gravity?
(For Your Information)

Answer 9

Force of gravity produces a constant acceleration of -9.81m/s^2 on bodies near the surface of the earth

Question 10

What are the factors that influence the trajectory of a projectile?

Answer 10

1) Projection Angle
2) Projection Speed
3) Relative Projection Height

Question 11

What is projection angle?

Answer 11

The direction of projection with respect to the horizontal

(For example, projection angle is particularly important in shooting a basketball. A common error among novice players is shooting the ball with too flat a trajectory.)

Question 12

What is projection speed?

Answer 12

The magnitude of projection velocity

(For example, the instantaneous velocity of the shot at the moment of release primarily determines the ultimate horizontal displacement of the shot.)

Question 13

What is relative projection height?

Answer 13

The difference between projection height and landing height

Question 14

What are the three equations of constant acceleration?

Answer 14

1) v2 = v1 + at

2) d = v1/t + 1/2 at^2

3) v2^2 = v1^2 + 2ad