# Chapter 3: Motion, Acceleration and Forces

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Friction

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## Tags and Description

### 23 Terms

1

Friction

________: the force that opposes the sliding motion of two surfaces that are touching each other.

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2

Terminal Velocity

The ________ depends on the size, shape, and mass of a falling object.

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3

Weight

________ is a force and mass is a measure of the amount of matter an object contains.

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4

Newtons second law

According to ________, if the acceleration is zero, then the net force on the box is zero.

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5

Moon

On the ________, the gravitational force on the astronaut is less than it is on Earth.

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6

Earths Gravity

________ causes projectiles to follow a curved path.

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7

Chemical interactions

________ between atoms and molecules also are due to the electromagnetic force.

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8

Electricity

________ and magnetism are caused by the electromagnetic force.

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9

Newtons Second Law of Motion

________ describes how the forces exerted on an object its mass, and its acceleration are related.

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10

Gravity

________: an attractive force between any two objects that depends on the masses of the objects and the distance between them.

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11

Newtons Third Law of Motion

________: describes action- reaction pairs this way: When one object exerts a force on a second object, the second one exerts a force on the first that is equal in strength and opposite in direction.

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12

Momentum

________: the product of its mass and velocity.

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13

Air Resistance

________: opposes the motion of objects that move through the air.

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14

Gravitational Force

The weight of an object usually is the ________ between the object and Earth.

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15

Static Friction

________: the frictional force that prevents two surfaces from sliding past each other.

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16

Amount of Friction

The ________ between two surfaces depends on two factors- the kinds of surfaces and the force pressing the surfaces together.

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17

Momentum

________ is transferred in collisions.

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18

Friction

________ is due to microwelds formed between two surfaces.

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19

Static Friction

the frictional force that prevents two surfaces from sliding past each other

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20

Sliding Friction

the force that opposes the motion of two surfaces sliding past each other

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21

Centripetal Acceleration

Acceleration toward the center of a curved or circular path

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22

Centripetal Force

The net force exerted toward the center of a curved path

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23

Momentum

the product of its mass and velocity

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