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DMS > midterm > Flashcards

midterm Flashcards

1
Q

Definition of Motion

A

the change of a position of an object with respect to time

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2
Q

In order to describe motion you must specifify parameters such as

A

Displacement and Time

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3
Q

Definition of Vectors

A

Parameters that have a numerical value in a specific direction

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4
Q

Definition of Scalar

A

Parameters that have numerical values but no direction’s needed

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5
Q

Definition of Speed/Rate

A

A scalar quantity that measures the distance traveled over the change in time

Rate of motion or how fast something’s going

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6
Q

Symbol for Speed/Rate

A

V or r (sometimes)

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7
Q

Equation for Speed/Rate

A

V= d/t

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8
Q

Unit for speed/rate

A

m/s

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9
Q

Definition of Velocity

A

A vector quantity that measures displacement over the change in time

Tells speed and direction

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10
Q

Symbol for Velocity

A

V (same as speed/rate)

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11
Q

Equation for velocity

A

V= d/t (same as speed/rate)

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12
Q

Unit for Velocity

A

m/s in any given direction

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13
Q

Definition of Acceleration

A

The rate of change in speed with time

The rate at which an object changed its velocity

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14
Q

Symbol for Acceleration

A

a

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15
Q

Equation for acceleration

A

a = Vf- Vi / t

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16
Q

Unit for acceleration

A

m/s squared

17
Q

Definition of force

A

A vector quantity defined as a push or pull on an object

18
Q

Symbol for force

A

F

19
Q

Unit for force

A

N (Newton) and 1N = 1kg m/s squared

20
Q

Equation for force

A

F = m * a

21
Q

Definition of gravity

A

earth’s surrounded by its own gravitational field which exerts a constant force on all objects towards it (attractive)

22
Q

Law of acceleration of gravity

A

An object free-falling near the earths surface increases its velocity at a rate of 9.8 m/s for each second of its descent

23
Q

Symbol for law of acceleration of gravity

A

g

24
Q

Equation for law of acceleration of gravity

A

g = 9.8 m/s squared

25
Q

Definition for Velocity of a free-falling object

A

Free-falling objects are in a state of acceleration at a rate of 9.8 m/s squared

Its velocity is dependent upon the time its fallen

26
Q

The distance of a free-falling object is dependent upon…

A

the time it has fallen

27
Q

Formula for Distance covered by a free-falling object

A

d = .5 * g * t squared

28
Q

Definition of work

A

A force applied to an object causing its motion (displacement)

Must be a displacement of the object caused by force to be qualified as work

29
Q

Symbol for work

A

W

30
Q

Equation for work

A

W = f * d

31
Q

Unit for work

A

N*m = Joule (j)

32
Q

Definition for Energy

A

The ability to do work

33
Q

Definition for power

A

The rate at which work is done

Time it takes to do the work

34
Q

Symbol for power

A

P

35
Q

Equation for power

A

P = w/t

DMS (3 decks)

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