2.4 Changing Speed of Motion flashcards

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Last updated 12:00 PM on 6/13/26
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12 Terms

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Motion

An object's direction and speed.

<p>An object's direction and speed.</p>
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First Law of Motion

Objects in uniform motion stay that way unless acted upon by a force.

<p>Objects in uniform motion stay that way unless acted upon by a force.</p>
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Second Law of Motion

Force changes an object's velocity, not speed.

<p>Force changes an object's velocity, not speed.</p>
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Velocity

Speed and direction of an object.

<p>Speed and direction of an object.</p>
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Acceleration

Rate of change in velocity.

<p>Rate of change in velocity.</p>
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Example of Acceleration

A baseball accelerates when thrown or hit.

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Third Law of Motion

Every action has an equal and opposite reaction.

<p>Every action has an equal and opposite reaction.</p>
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Forces are described by

strength and direction; make objects change position.

<p>strength and direction; make objects change position.</p>
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Examples of Forces

Push, pull, gravity, friction.

<p>Push, pull, gravity, friction.</p>
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Forces that change velocity may be

Angle of contact, gravity, friction.

<p>Angle of contact, gravity, friction.</p>
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Net Force

Combination of forces acting on an object simultaneously.

<p>Combination of forces acting on an object simultaneously.</p>
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What happens to energy when objects collide?

Energy from one object transfers to another, changing the second object's speed and direction.

<p>Energy from one object transfers to another, changing the second object's speed and direction.</p>