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Online Physical Science > Hewitt Chap 3 > Flashcards

Hewitt Chap 3 Flashcards

1
Q

The amount of matter in an object.

A

Mass

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2
Q

kilogram

Is a unit of?

A

Mass

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3
Q

newton

Is a unit of?

A

Force

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4
Q

meter

Is a unit of?

A

Distance

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5
Q

inch

Is a unit of?

A

Distance

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6
Q

kg m/sec

Is a unit of?

A

Momentum

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7
Q

grams x miles/hr

Is a unit of?

A

Momentum

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8
Q

m/(s x s)

Is a unit of?

A

Acceleration

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9
Q

m/s2

Is a unit of?

A

Acceleration

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10
Q

m/s

Is a unit of?

A

Speed

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11
Q

m/s - North

Is a unit of?

A

Velocity

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12
Q

miles/hr

Is a unit of?

A

Speed

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13
Q

cm/day

Is a unit of?

A

Speed

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14
Q

miles East

Is a unit of?

A

Displacement

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15
Q

miles/hr - West

Is a unit of?

A

Velocity

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16
Q

m/s SouthEast

Is a unit of?

A

Velocity

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17
Q

Pounds

Is a unit of?

A

Force

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18
Q

kiloNewtons

Is a unit of?

A

Force

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19
Q

milliNewtons

Is a unit of?

A

Force

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20
Q

A force is a

A

Push or a Pull

21
Q

Normal Force means a force ___________ to a surface

A

Perpendicular

22
Q

Normal

A

Perpendicular

23
Q

Another way to say perpendicular

A

Normal

24
Q

How can you determine the direction in which friction acts upon a moving object

A

Friction will act in the direction opposite of the motion of the object.

25
Q

Definition of Mass

A

The amount of matter in an object.

(Each time you add an atom to an object, you add mass)

26
Q

Definition of Weight

A

The force of gravity upon an object.

27
Q

Mass and Weight mean ____________ things.

A

Different

28
Q

Formula for finding Weight

Weight = ___________ x ____________

A

Weight = mass x gravity

29
Q

What is this thing?

(scroll down and look at entire picture)

A

Your secret weapon to get 4 questions right on the upcoming test.

30
Q

What can this tell you about mass and weight?

A

The Earth’s gravity applies a force of

9.8-Newtons to a 1-kg mass

31
Q

If you took this thingy to the moon and looked at it, the mass would _______________?

A

Stay the same.

The 1-kg label on th object will still say 1-kg, and it will still be correct.

32
Q

If you took this thingy to the moon and looked at it, the weight would _______________?

A

Go down.

The moon has less gravity, so the red needle would only point to about 2.

33
Q

What can this thingy tell you about weight?

A

Weight is a force.

34
Q

The force of gravity upon an object

A

weight

35
Q

Two definitions of acceleration

A

Change in speed or direction

or

Change in Velociy

36
Q

Formula for acceleration

Accleration =

A

Acceleration = change in velocity/change in time

can also be written as:

a = Δv / Δt

37
Q

Mass means pretty much the same thing as ________

A

Inertia

38
Q

If there is no air friction, which would experience a greater acceleration when dropped off a cliff, a large rock or a small rock?

A

Neither, both would accelerate at the same rate, and both would reach the ground at the same time.

39
Q

Gravitational Field Strength near the Earth’s surface

A

9.8 newtons/kilogram

40
Q

The word “static” means….

A

at rest

41
Q

Static Friction means

A

The force of friction preventing a motionless object from moving.

42
Q

Sliding Fricition means…

A

The force of friction impeding the motion of an object sliding across a surface.

43
Q

Air Friction

A

The force of friction impeding the motion of an object fighting its way through the air.

(It has to bump the air molecules out of the way)

44
Q

You can reduce the friction between to sliding surfaces by coating the surfaces with a ______________.

A

Lubricant

(oil, grease. etc)

45
Q

What are these things?

A

Ball Bearings

46
Q

What would happen to your mass if you left Earth and went to Jupiter?

A

Nothing.

Mass is a measure of how much “stuff” or matter there is in an object.

47
Q

What would happen to your weight if you left Earth and went to Jupiter?

A

Your weight would go up.

Jupiter has a much stronger gravitational field than the Earth. Weight is the pull of gravity upon an object.

48
Q

Interaction

A

When two objects have an effect upon each other.

49
Q

Three most common types of interaction

A

Touch

Gravity

Friction

Online Physical Science (16 decks)

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