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science Flashcards

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1
Q

Distance

A

The amount of space between two things

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2
Q

Displacement

A

Moving something from its place

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3
Q

Speed

A

the rate at which a object moves

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4
Q

Average speed

A

calculated by dividing the total distance an object traveled by the total time it took the object to travel the distance (s=d/t)

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5
Q

Instantaneous speed

A

The speed of an object at one instant of time

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6
Q

Velocity

A

Speed in a given direction

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7
Q

Force

A

a push or a pull that can change the motion of an object, measured with a spring scale in Newton.

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8
Q

Acceleration

A

the rate of change in an object’s speed

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9
Q

Net force

A

The overall force on an object when all the individual
forces acting on it are added together

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10
Q

Balanced forces:

A

separate forced on an object that combined do not change the movement of the object

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11
Q

Inertia

A

the tendency of all objects to resist any change in motion

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12
Q

Newton’s second law of motion

A

Acceleration of an object depends on the object’s mass and magnitude of the force acting upon it

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13
Q

Friction

A

The force that one surface exerts on another when the
two surfaces rub against each other

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14
Q

Static friction

A
  • Friction that occurs when two objects are at rest relative to each other
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15
Q

Sliding friction

A

Sliding friction force opposes the movement between two contact surfaces that slide against each other

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16
Q

Gravity

A

The force that pulls objects toward each other. Gravity is
the earth’s pulling force that makes things fall and gives
things weight

16
Q

Air resistance

A

The fluid friction experienced by objects falling through
the air

17
Q

Weight

A

The force of gravity on an object at the surface of a
planet

18
Q

Centripetal acceleration

A

the acceleration of an object moving in a circle that is directed
toward the center of the circle

19
Q

Centripetal force

A

any force that causes an object to move in a circle

20
Q

Newton’s third law of motion

A

Newton’s Law that states that for every action there is an equal and opposite reaction

21
Q

Momentum

A

the characteristic of a moving body that is caused by its mass and its motion

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