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Physics > Chapter 4.1-4.2 Test > Flashcards

Chapter 4.1-4.2 Test Flashcards

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0
Q

System

A

Object or objects of interest that can interact with each other and the external world

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1
Q

Force

A

A push or a pull exerted on an object; vector; contact or field

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2
Q

Free body diagram

A

A physical model that represents the forces acting on a system

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3
Q

Net force

A

Vector sum of all the forces on an object

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4
Q

The relationship between force and acceleration is

A

Linear

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5
Q

A=

A

Fnet/m

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6
Q

Fnet=

A

Ma

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7
Q

Newton’s second law

A

The acceleration of an object is proportional to the net force and inversely proportional to the mass of the object being accelerated

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8
Q

Newton’s first law

A

An object at rest will stay at rest and a moving object will continue moving in a straight line with constant speed if the net force acting on an object is zero

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9
Q

Inertia

A

The tendency of an object to resist changes in velocity

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10
Q

Equilibrium

A

The condition in which the net force of an object is zero

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11
Q

Net force is

A

Something that disturbs state of equilibrium

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12
Q

Weight

A

The gravitational force experienced by an object on an object

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13
Q

Gravitational field

A

A vector quantity that relates the mass of an object to the gravitational force it experiences at a given location; Fg=mg

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14
Q

Apparent weight

A

The support force acting on an object

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15
Q

Weightlessness

A

An objects apparent weight of zero that results when there are no contact forces supporting the object

16
Q

Drag force

A

He force exerted by a fluid on an object that opposes the objects motion through the fluid

17
Q

Terminal velocity

A

The constant velocity of an object that is reached when the drag force is equal to the force of gravity

18
Q

Newton’s third law

A

All forces come in pairs and that the two forces in a pair act on different objects , are equal in strength and opposite in direction

19
Q

Accelerations are result of

A

Unbalanced force acting on an object

20
Q

Force causes what to change and I’m return what to change

A

Velocity / acceleration

Physics (6 decks)

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