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Statics > Quiz #1 > Flashcards

Quiz #1 Flashcards

1
Q

Newton’s 1st Law

A

If an object is in motion, it will remain in motion. If an object is at rest, it will remain at rest, unless a force acts on it

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2
Q

Newton’s 2nd Law

A

When the sum of forces acting on an object is nonzero, the sum of the forces equals the product of the mass and its acceleration. F=ma

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3
Q

Newton’s 3rd Law

A

For every reaction, there is an equal and opposite reaction.

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4
Q

Particle

A

Is a mathematical model of an object as a mass point. i.e. A particle has mass but no size (dimensions) or shape

Object as a mass point.

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5
Q

Gravity (g)

A

9.81 m/s^2 OR 32.2 ft/s^2

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6
Q

Mass

A

Scalar Quantity

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7
Q

Mass

A

Amount of material in body

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8
Q

Mass

A

Measure of Inertia
a.) Inertia is the measure of the resistance to a change in motion.

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9
Q

Mass

A

Same in any gravitational field
a.) independent of location

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10
Q

Mass

A

Units: a) Slugs b) Kilograms
1 Slug = 14.59 kg

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11
Q

Weight

A

Vector quantity

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12
Q

Weight

A

Effect of gravity on a body

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13
Q

Weight

A

Measure of the force exerted on a body by a gravitational field

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14
Q

Weight

A

Varies with the strength of gravitational pull
a) dependent on location

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15
Q

Weight

A

Units: a) Pounds b) Newtons
1lb = 4.448N

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16
Q

Rigid Body

A

A mathematical model of a material body or a system of particles in which the distance between any two particles remains constant. i.e. NO DEFORMATION

“Material body or system of particles w/ NO DEFORMATION”

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17
Q

Scalar

A

A quantity that can be completely specified without mentioning a direction.

Time, temperature, volume, mass, or energy speed, distance

Only magnitude

18
Q

Vector

A

A quantity (directed line segment) is completely specified by mentioning magnitude and direction, and it is added according to the parallelogram law.

Displacement, velocity, acceleration, momentum, or force

Includes magnitude and direction

19
Q

Magnitude

A

Length of a vector

20
Q

Free Vector

A

Has a definite magnitude and direction but no specific location in space

21
Q

Sliding Vector

A

one which can be moved along a given line collinear with the vector itself

22
Q

Bound Vector

A

One with a specified point of application

23
Q

Characteristics of Force

A

1) Point of application
2) its magnitude
3) its direction
a) Defined by the line of action and the sense of the force\
b) Line of Action is the infinite straight line along which
the force acts.

24
Q

Concentrated Force (Load)

A

represents the effect of loading which is assumed to act at a point on a body

25
Q

Distributed Load

A

is a force or force system spread over an area, either uniformly or non-uniformly

26
Q

External Forces

A

A force acting on the outside of a structure set in equilibrium

27
Q

Internal Forces

A

a force effect within the entity or any component part of a structure set in equilibrium

28
Q

Collinear Forces

A

force acting along the same line of action

29
Q

Coplanar Forces

A

forces that all lie in the same plane

30
Q

Concurrent Forces

A

forces that all intersect at a common point.

31
Q

General Space Force System

A

Non-coplanar, non-parallel, non-concurrent, con-collinear force system

32
Q

Moment

A

a moment of a force provides a measure of the tendency of a force to cause an object to rotate about a point or axis

Think Torque?

M = Fd (Scalar) M = r x F (Vector)

33
Q

Parallelogram Rule

A

Head-to-tail addition of vectors

34
Q

Moment

A

The tendency of a force to cause a rotation about a point or axis

35
Q

Varignon’s Theorem

A

Can use the force or the component of a force to calculate the moment

36
Q

Equivalence

A

All systems can be reduced to a single force and moment and in special situations can reduce to a single force at a known location

37
Q

Transmissibility

A

Does not matter whether you push or pull as long as you maintain the same line of action. The result is the same

38
Q

Lateral Transfer Theorem

A

Allows the moment of a force laterally (Different from the line of action)
As long a moment (couple) is added

39
Q

Superposition

A

As long as there is linearity, a complex problem can be broken down into simpler pieces and summed

40
Q

Friction

A

Columb’s Law of dry friction which is empirical in nature
not derived, but observed

41
Q

Area Moment of Inertia

A

Stiffness parameter based on shape

Statics (1 decks)

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