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mic test > 4-6 > Flashcards

4-6 Flashcards

1
Q

Displacement & Velocity

study of motion

A

mechanics

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2
Q

Displacement & Velocity

description of motion or how it moves

A

kinematics

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3
Q

Displacement & Velocity

explaining motion or what are the forces that brings into motion

A

dynamics

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4
Q

Displacement & Velocity

treating objects as particles (points) to make things simple

A

idealization

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5
Q

Displacement & Velocity

always has a reference point to the actual location of object or points from common reference point

A

position

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6
Q

Displacement & Velocity

initial to final position or shortest directed distance & path independent

A

displacement

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7
Q

Displacement & Velocity

length of the path you took & path dependent

A

distance

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8
Q

Displacement & Velocity

the areas of velocity vs. time curve

A

displacement

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9
Q

Displacement & Velocity

when an object is moving with the same rate of change of velocity

A

constant acceleration

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10
Q

Displacement & Velocity

the areas of acceleration vs. time curve

A

velocity

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11
Q

Displacement & Velocity

is a scalar quantity that states when and how long the motion occurs

A

time

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12
Q

Displacement & Velocity

is used in referring to a specific time an object is at a particular point

A

time interval

∆t = t2 − t1

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13
Q

Displacement & Velocity

refers to the time rate change of an object’s
position between its initial and final positions

A

average velocity

vav−x = x2 − x1/t2 − t1 = ∆x/∆t

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14
Q

Displacement & Velocity

is the slope of the line connecting x1 and x2

A

average velocity

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15
Q

represents the time progression of an object’s position (report motion)

A

position time (x-t) graph

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16
Q

velocity at a specific instant in time and is the slope of the tangent line in the x-t graph (average velocity)

A

instantaneous velocity

17
Q

is the slope of the line joining v1 and v2 (average acceleration)

A

velocity-time (v-t) graph

18
Q

acceleration at a specific instant in time and slope of the tangent line in the v-t graph

A

instantaneous acceleration

19
Q

Acceleration

is the rate of change of velocity with time

A

acceleration

20
Q

Acceleration

the slope in velocity vs. time graph represented by

A

acceleration

21
Q

Acceleration

accelerates in the direction of velocity means

A

speeding up

22
Q

Acceleration

accelerates against the velocity means

A

slowing down

23
Q

Acceleration

accelerates at a direction that neither parallel or anti-parallel its motion means

A

change in direction

24
Q

Acceleration

(+) velocity, (-) acceleration
(-) velocity, (+) acceleration

A

slowing down

25
Q

Acceleration

(+) velocity, (+) acceleration
(-) velocity, (-) acceleration

A

speeding up

26
Q

Uniformly Accelerated Motion and Free Fall

if an object has a constant acceleration, the instantaneous acceleration is equal to the average acceleration

A

uniform acceleration

27
Q

Uniformly Accelerated Motion and Free Fall

constant acceleration of a body falling under the influence of the earth’s gravitational attraction

A

free fall

28
Q

Uniformly Accelerated Motion and Free Fall

  • gravitational pull of Earth results accelerated falling motion
  • acceleration of object varies with distance from Earth’s surface
  • acceleration does not vary with mass
  • constant acceleration due to gravity is 9.8 m/s^2
  • any falling body will experience air resistance, slowing down its motion
A

Freefall Facts

29
Q

Uniformly Accelerated Motion and Free Fall

  • neglect air resistance
  • all bodies at a particular location fall with the same downward acceleration regardless of size and shape
  • distance of fall is smaller than radius of the Earth
  • ignore effects due to the earth’s rotation
A

Freefall Assumptions

mic test (5 decks)

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