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KIN 306 > Linear Kinetics/Kinematics and Projectile Kinematics > Flashcards

Linear Kinetics/Kinematics and Projectile Kinematics Flashcards

0
Q

Projection Height (+|-)

A

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

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1
Q

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

A

Landing ht > release = angle > 45

Landing ht < release = angle < 45

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2
Q

What are the types of motion?

A

Linear- rectilinear, curvilinear
Angular
General

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3
Q

What are the 3 basic kinetic variables?

A

Velocity
Acceleration
Position

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4
Q

What is calculated from position data?

A

Velocity

Acceleration

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5
Q

What factors influence projectile trajectory?

A
  1. Gravity- constant
  2. Air Resistance- negligible
    3/4. Projection Velocity (angle and speed)
  3. Projection Height (+ = dec optimal angle, - = inc optimal angle)
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6
Q

What is the best measure of inertia?

A

Mass- more mass = more resistance to change

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7
Q

Momentum:

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

A

Same
Greater
Greater
(L = mv)

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8
Q

CoR:

Higher _____ ______ = _______ CoR

A

Bounce height

Higher

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9
Q

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

A

Momentum
Greater
Impulse

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10
Q

How does temperature affect CoR?

A

Increase temp = increase CoR

Extreme temps cause decrease

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11
Q

Projection Angle for Max Distance

A

= 45 degrees

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12
Q

Projection Angle for Max Height

A

= 90 degrees

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13
Q

General Motion

A

The combination of linear and angular motion

- moving along a line with rotation

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14
Q

Positive Acceleration

A

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

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15
Q

Negative Acceleration

A

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

16
Q

Motion

A

The action of process of change in position

17
Q

Speed (s)

A

Rate of change in in distance with responses to time

Scalar

18
Q

Kinematics

A

Description of motion without regard to the forces causing motion

19
Q

Displacement

A

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

20
Q

Kinetics

A

The study of the underlying causes (forces) of motion

21
Q

Elastic collisions

A

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

22
Q

Position

A

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

23
Q

Impulse and Momentum Relationship

A

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
24
Q

Coefficient of Restitution

A
  • 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
25
Q

Inertia

A
  • an object’s resistance to change in motion

- Newton’s 1st law

26
Q

Acceleration

A
  • the rate of change in an object’s velocity
  • vector
  • speeding up, slowing down, stops or change in direction
27
Q

Linear Motion

A

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

28
Q

Distance

A
  • scalar
  • the actual path of movement
    “How far?”
29
Q

Rectilinear Motion

A
  • no change in orientation

- all points move same distance in straight line

30
Q

Curvilinear Motion

A
  • NO change in orientation, change in PATH of points along a curve
31
Q

Angular Motion (rotary/rotation)

A
  • orientation of object changes- moves in circles or about an axis
  • all points do NOT always travel the same distance
32
Q

Velocity

A
  • vector

- change in position/displacement with respect to time

33
Q

Conservation of Momentum

A

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

34
Q

Inelastic Collisions

A

Momentum is conserved, objects remain together after collision

KIN 306 (3 decks)

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