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PHY 109 > Lesson 2: 1D Motion > Flashcards

Lesson 2: 1D Motion Flashcards

1
Q

What is displacement?

A

Change in position, vector

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2
Q

How do we find displacement?

A

Xf - X0

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3
Q

What is distance?

A

length of entire motion traveled, scalar

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4
Q

What is average velocity?

A

Displacement/Time, vector

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4
Q

What units do we use for displacement?

A

meters

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5
Q

What is instantaneous velocity?

A

Velocity at a specific point in time.

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6
Q

How can we find instantaneous velocity on a position vs time graph?

A

Determine the slope of the line at that point in time

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7
Q

What are the units we use for velocity?

A

m/s

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8
Q

What is average acceleration?

A

Change in Velocity/Time

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9
Q

What does deceleration mean?

A

Slowing down

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10
Q

If an object moves in the positive x direction and speeds up, what will be the direction of acceleration?

A

positive

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11
Q

If an object moves in the negative x direction but slows down, what will be the direction of acceleration?

A

positive

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12
Q

What is instantaneous deceleration?

A

Acceleration at a specific point in time

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13
Q

How can we find instantaneous acceleration on a velocity vs time graph?

A

Determine the slope of the line at that point in time

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14
Q

What is the first kinematic equation?

A

vf = v0 + at

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15
Q

What is the second kinematic equation

A

Δx = v0t + 1/2 at^2

16
Q

What is the third kinematic equation?

A

vf^2 = v0^2 + 2a Δx

17
Q

What condition must be met in order to use the kinematic equations?

A

acceleration must be constant

18
Q

Given: acceleration, time, initial velocity. How do you find displacement?

A

second equation

19
Q

Given: final velocity, acceleration, initial velocity. How do you find time?

A

first equation

20
Q

Given: initial velocity, acceleration, final velocity. How do you find displacement?

A

third equation

21
Q

Given: final velocity, initial velocity, time. How to find displacement?

A

1) first equation
2) second equation

22
Q

Given: time, initial velocity, displacement. How do you find final velocity?

A

1) second equation
2) first equation

23
Q

Given: final velocity, displacement, initial velocity. How do you find time?

A

1) third equation
2) first equation

24
Q

If an object is in freefall, what is the acceleration of that object?

A

-9.8 m/s^2

25
Q

You drop an object from some height. What is the initial velocity of that object?

A

0 m/s

26
Q

You throw and object straight up into the air and it comes straight back down. Where is it moving the fastest?

A

Just after it leaves your hand and just before it returns to your hand

27
Q

You throw an object straight up into the air and it comes straight back down. Where is it moving the slowest?

A

at the top (apex) of the motion

28
Q

You drop an object from some height. What is the direction of displacement?

A

negative

29
Q

The image shows a position vs time graph for motion in one dimension. What will the velocity vs time graph look like?

A
30
Q

The image shows a velocity vs time graph for motion in one dimension. What will the acceleration vs time graph look like?

A
31
Q

The image shows a position vs time graph for motion in one dimension. What will the velocity vs time graph look like?

A
32
Q

The image shows a velocity vs time graph for motion in one dimension. What will the acceleration vs time graph look like?

A
33
Q

The image shows a position vs time graph for motion in one dimension. What will the velocity vs time graph look like?

A
34
Q

The image shows a velocity vs time graph for motion in one dimension. What will the acceleration vs time graph look like?

A

PHY 109 (8 decks)

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