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Physical Science > Chapter 10 Measuring Motion > Flashcards

Chapter 10 Measuring Motion Flashcards

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1
Q

Motion

A

an object’s change in position relative to a reference point.

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2
Q

Reference Point

A

A basis or standard for comparison of an objects motion

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3
Q

Displacement

A

the change in the position of an object.

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4
Q

Speed

A

the distance traveled divided by the time interval during which the motion occurred. Speed describes how fast an object moves.

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5
Q

Average Speed

A

The average Speed of all the time with a certain distance, calculated as distance divided by time.

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6
Q

Instantaneous Speed

A

The speed at a given point in time.

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7
Q

Velocity

A

the speed of an object in a particular direction.

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8
Q

Resultant Velocity

A

Combination of velocities in an equation

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9
Q

Acceleration

A

The rate at which velocity changes over time.

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10
Q

Centripetal Acceleration

A

The rate of change of tangential velocity

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11
Q

Constant Acceleration

A

Change in velocity that doesn’t vary over a given length of time

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12
Q

Force

A

An action exerted on a body in order to change the body’s state of rest or motion; force has magnitude and direction

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13
Q

Net Force

A

The combination of all the forces acting on an object

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14
Q

Balanced Forces

A

Do not cause an object at rest to start moving. They do not cause a change in motion of a moving object either

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15
Q

Friction

A

A force that opposes motion between two surfaces that are in contact

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16
Q

Sliding Friction

A

The friction that occurs when objects slide past each other

17
Q

Rolling Friction

A

The friction that occurs when a round object rolls over a flat surface. Less than sliding surface

18
Q

Fluid Surface

A

The friction that occurs when any object moving through a fluid. Such as air encounters friction between the air and the surface of a moving object

19
Q

Static Friction

A

The force that resists the initiation of sliding motion between two surfaces that are in contact and at rest

20
Q

Kinetic Friction

A

The force that opposes the movement of two surfaces that are in contact and are sliding over each other

Physical Science (11 decks)

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