Chapter 4 - Newton's Second Law Flashcards

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1
Q

What is a Force?

A

A force is an interaction between two objects.

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2
Q

What is the definition of Friction?

A

Friction is when surfaces slide over one another in the direction that opposes motion. The atoms cling together.

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3
Q

Is Static or Sliding Friction greater?

A

Static friction is slightly greater.

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4
Q

How are Acceleration and Mass related?

A

Acceleration and mass are inversely related.

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5
Q

What is the weight of an object due to?

A

Gravity! (mg).

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6
Q

What is Newton’s Second Law?

A

An object’s acceleration is DIRECTLY proportional to the net force acting on the object and INVERSELY proportional to the mass of the object.

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7
Q

What is the equation for Acceleration? What is the other way to write this equation?

A

Acceleration (a) = net force (F)/mass (m).
F = ma

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8
Q

Do bigger or smaller objects fall faster in FREE FALL? Why?

A

They both fall at the same speed! This is because the ratio F/m is the same.

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9
Q

What does Air Drag depend on?

A

Surface area: The frontal area of the falling object
&
Speed: The speed of the falling object

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10
Q

What is Terminal Speed?

A

Terminal speed is when acceleration terminates.

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11
Q

What is Terminal Velocity?

A

Terminal velocity is when acceleration & direction terminate.

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