Chapter 11 Forces Flashcards

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1
Q

Inertia

A

an object at rest stays at rest and if the object is moving it keeps moving at a constant velocity

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2
Q

Newton’s 1st law of motion

A

Matter withstands changes in motion. An object won’t move unless a force is put on it.

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3
Q

Newton’s 2nd law of motion

A

Explains what happens when an unbalanced force on an object’s motion

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4
Q

Free fall

A

Motion of a body and the only force acting on the body is gravity.

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5
Q

Terminal velocity

A

A falling object’s constant velocity when air resistance’s force is equal in magnitude and gravity is the force opposite in direction.

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6
Q

Projectile motion

A

Curved path an object follows when thrown near earth’s surface

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7
Q

Law of universal gravitation

A

In the universe all of the objects are attracted to each other through gravitational force.

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8
Q

Weight

A

Amount of gravity’s force on an object

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9
Q

Apparent weightlessness

A

Astronauts flat in space because them and their surroundings are accelerating at the same rate. So the floor in the shuttle doesn’t push up on them.

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10
Q

Newton’s 3rd law of motion

A

Every action force there’s an opposite reaction force and equal reaction force.

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11
Q

Action force

A

The force put on an object

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12
Q

Reaction force

A

Force that object is pushing back on a force pushing on it

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