Linear Kinetics/Kinematics and Projectile Kinematics

Question 0

Projection Height (+|-)

Answer 0

+ projection dec optimal PA
- projection inc optimal PA
+ = landing < release (angle < 45)
- = landing > release (angle > 45)

Question 1

The effect of Height and Angle of Release on the range of a projectile:

Answer 1

Landing ht > release = angle > 45

Landing ht < release = angle < 45

Question 2

What are the types of motion?

Answer 2

Linear- rectilinear, curvilinear
Angular
General

Question 3

What are the 3 basic kinetic variables?

Answer 3

Velocity
Acceleration
Position

Question 4

What is calculated from position data?

Answer 4

Velocity

Acceleration

Question 5

What factors influence projectile trajectory?

Answer 5

1. Gravity- constant
2. Air Resistance- negligible
   3/4. Projection Velocity (angle and speed)
3. Projection Height (+ = dec optimal angle, - = inc optimal angle)

Question 6

What is the best measure of inertia?

Answer 6

Mass- more mass = more resistance to change

Question 7

Momentum:

2 objects can have the ______ velocity, but the object with the ______ mass will have ______ momentum.

Answer 7

Same
Greater
Greater
(L = mv)

Question 8

CoR:

Higher _____ ______ = _______ CoR

Answer 8

Bounce height

Higher

Question 9

The greater the ______ the ______ the opposing _____ need to slow down.

Answer 9

Momentum
Greater
Impulse

Question 10

How does temperature affect CoR?

Answer 10

Increase temp = increase CoR

Extreme temps cause decrease

Question 11

Projection Angle for Max Distance

Answer 11

= 45 degrees

Question 12

Projection Angle for Max Height

Answer 12

= 90 degrees

Question 13

General Motion

Answer 13

The combination of linear and angular motion

- moving along a line with rotation

Question 14

Positive Acceleration

Answer 14

Positive direction (right) | Negative direction (left)
Inc magnitude | Dec magnitude
(Net accel to the right +) | (Net accel to the right +)

Question 15

Negative Acceleration

Answer 15

Positive direction | Negative direction
Dec magnitude | Inc magnitude
(Net accel to the left -). | (Net accel to the left -)

Question 16

Motion

Answer 16

The action of process of change in position

Question 17

Speed (s)

Answer 17

Rate of change in in distance with responses to time

Scalar

Question 18

Kinematics

Answer 18

Description of motion without regard to the forces causing motion

Question 19

Displacement

Answer 19

The straight line change in position from the starting position to the final position
“How far and in what direction?”

Question 20

Kinetics

Answer 20

The study of the underlying causes (forces) of motion

Question 21

Elastic collisions

Answer 21

When momentum is conserved and the objects separate after collision
Lbefore = Lafter

Question 22

Position

Answer 22

An objects location on an axis, in a plane or in space

Question 23

Impulse and Momentum Relationship

Answer 23

Describes the effects of a force over a period of time

• impulse causes mass to change its velocity, or
• the greater the momentum, the greater the opposing impulse needed to “slow” an object

Question 24

Coefficient of Restitution

Answer 24

- relative elasticity of impact - influences amount off time it takes to restore shape - dependent on characteristics of both object and surface - influence by temp and velocity of impact

Question 25

Inertia

Answer 25

- an object's resistance to change in motion | - Newton's 1st law

Question 26

Acceleration

Answer 26

- the rate of change in an object's velocity - vector - speeding up, slowing down, stops or change in direction

Question 27

Linear Motion

Answer 27

Rectilinear motion- all points on an object move in a straight line (same distance), no change in orientation Curvilinear- no change in orientation, move along a curve

Question 28

Distance

Answer 28

- scalar - the actual path of movement "How far?"

Question 29

Rectilinear Motion

Answer 29

- no change in orientation | - all points move same distance in straight line

Question 30

Curvilinear Motion

Answer 30

- NO change in orientation, change in PATH of points along a curve

Question 31

Angular Motion (rotary/rotation)

Answer 31

- orientation of object changes- moves in circles or about an axis - all points do NOT always travel the same distance

Question 32

Velocity

Answer 32

- vector | - change in position/displacement with respect to time

Question 33

Conservation of Momentum

Answer 33

When the net external force of a system/object is zero, the total linear momentum will remain constant

Question 34

Inelastic Collisions

Answer 34

Momentum is conserved, objects remain together after collision