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GENERAL PHYSICS 1 > PRELIMS > Flashcards

PRELIMS Flashcards

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1
Q

An action: push or a pull

A

Force

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2
Q

A force ____/____ on an object

A

acts/exerts

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3
Q

A force requires a cause: an _____.

A

agent

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4
Q

A force can be either a contact or a long-range force. True or False?

A

True

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5
Q

When you are pulling a rope attached to a box, what is the agent? The rope or the box?

A

The rope

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6
Q

When forced are exerted on an object,they combine to form a _______.

A

Net Force

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7
Q

What does the triple parallel horizontal lines mean?

A

“is defined as”

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8
Q

What do you call the summation of forces?

A

Superposition of forces

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9
Q

The pull of a planet on an object or near the surface is called what?

A

Gravitational Force

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10
Q

What is the agent for the gravitational force?

A

The entire planet

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11
Q

Gravity acts on an object, whether moving or at rest. True or False?

A

True

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12
Q

What is the symbol for gravitational force?

A

F with an arrow above it the sub big G. (F_G)

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13
Q

The gravitational force always points vertically or horizontally downward?

A

Vertically

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14
Q

A force with a symbol F sub Sp.

A

Spring Force

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15
Q

A spring can push when?

A

compressed

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16
Q

A spring can pull when compressed. True or False?

A

False. A spring can pull when it is stretched.

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17
Q

A contact force that is exerted when a spring or wire pulls an object. Represented by a captial T with arrow above it.

A

Tension Force

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18
Q

What is the direction of the tension force?

A

Always along the direction of the rope or spring.

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19
Q

In Ball-and-Spring model of solids, solids are represented by what array and connected by springs?

A

Array of Balls.

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20
Q

What force does the stretched or compressed bonds exert?

A

Spring Forces

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21
Q

The force exerted perpendicular to a surface (the agent) against an object that is pressing against the surface.

A

Normal Force (n)

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22
Q

Like the Normal Force, it is the force exerted by the surface.

A

Friction.

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23
Q

If the normal force is always perpendicular to the surface, the friction force is always _____ to the surface.

A

Parallel

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24
Q

What are the two kinds of friction?

A

Kinetic and Static Friction

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25
Q

denoted by f sub k.

A

Kinetic Friction

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26
Q

A type of friction that appears as an object slides across a surface.

A

Kinetic Friction

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27
Q

Kinetic Force opposes the motion. True or False?

A

True

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28
Q

The friction force vector points in a direction _____ the velocity vector.

A

opposite

29
Q

Denoted as f sub s.

A

Static Friction

30
Q

It points to the direction necessary to prevent motion.

A

Static Friction

31
Q

One example of a resistive force.

A

friction at a surface

32
Q

The resistive force of fluid is called ____.

A

Drag

33
Q

F sub drag is the symbol of what?

A

A resistive force called drag.

34
Q

Like kinetic friction, it points to the opposite direction of motion.

A

Drag

35
Q

Neglect air resistance unless asked.

A

Okay.

36
Q

The force that occurs when a jet or rocket engine expels gas molecules at high speed.

A

Thrust

37
Q

No special symbol for thrust so we call it ____.

A

F sub thrust with arrow on the top.

38
Q

Electricity and magnetism, like gravity, exert contact forces or long-range forces?

A

Long-rage forces.

39
Q

The acceleration is _______ proportional to the object’s mass.

A

Inversely

40
Q

The amount of matter an object contains.

A

Mass

41
Q

The more matter an object has, the more it resists accelerating in response to a force. True or False.

A

True

42
Q

The tendency of an object to resist a change in its velocity is called ____.

A

Inertia

43
Q

A measure of an object’s resistance to changing its motion is called inertial mass. True or False?

A

True.

44
Q

What is Newton’s Second Law of Motion?

A

An object accelerates in the direction of the net force vector.

45
Q

formula of acceleration (a)

A

Fnet over m

46
Q

A ____ is an interaction between 2 objects.

A

force

47
Q

“For every action there is an equal but opposite reaction.”

A

Newton’s Third Law

48
Q

An object at rest is in a _____ state.

A

Natural

49
Q

Define mechanical equilibrium

A

An object at rest or at motion at constant velocity with zero net force is called Mechanic Equilibrium.

50
Q

There is a object/cause needed for an object to move. True or False?

A

False. Force is what causes an object to change its velocity.

51
Q

Formula for net force.

A

Mass times acceleration

52
Q

The natural state of an object is not rest but is uniform motion with constant velocity.

A

Rest is v = 0

53
Q

A reference frame in which Newton’s first law is valid.

A

Inertial Reference Frame

54
Q

True or False. Accelerating reference frames are not inertial references frame.

A

True

55
Q

Forces exist the point of contact above the agent and the object experiencing the force. True or False.

A

False. *Between the agent and the object.

(except for the few special cases of long-range forces)

56
Q

A quantity that is fully described by a single number (with units)

A

Scalar Quantity

57
Q

Mass(m) and Volume (V) are examples of what quantity?

A

Scalar Quantity

58
Q

A quantity having both a size and a direction is called a vector. True or False.

A

True.

59
Q

What is the mathematical term for the length, or size, of a vector?

A

Magnitude

60
Q

A quantity having a magnitude and a direction.

A

Vector Quantity

61
Q

What is the geometric representation of a vector?

A

An arrow.

62
Q

The magnitude of a vector is a?

A

Scalar

63
Q

The straight-line connection from the initial to the final position.

A

Displacement

64
Q

The sum of two vectors.

A

Resultant Vector

65
Q

The tip-to-tail method for adding vectors.

A

Graphical Addition

66
Q

Formula to find the angle.

A

arccos (A²+C²-B²/2AC)

67
Q

An artificially imposed grid that you place on a problem to make quantitative measures.

A

Coordinate System

68
Q

Velocity, Acceleration, and Forces.

A

Examples of Vector Quantity

GENERAL PHYSICS 1 (3 decks)

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