3.2 Newton's Second Law of Motion

Newton's Second Law

A video of Paul in the classroom is followed up with a discussion of force, mass, and the acceleration of freely-falling rocks.

Force Causes Acceleration

Examples are provided to show how acceleration is directly related to force and inversely related to mass. Duration: 4:15.

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Free Fall

The ratio of an objects weight to mass is always the same, which explains how all freely falling objects fall with the same accelertion. Duration: 9:28.

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Acceleration Less Than "g"

Hewitt uses the example of two parachutists to explain the effect of wind resistance upon a falling object. Duration: 5:52.

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Nellie in an Elevator

Paul investigates the forces that act on Nellie Newton in an elevator.

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