Displacement (Brigthstorm)

Displacement is the change in a position vector. It is not the same as distance, which is a scalar measurement. The net vector of multiple displacment vectors if found according to the rules of vector addition.

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Relativity in Motion (Brightstorm)

The motion of any object is only meaningful when given relative to something else. Relativity in motion assures us that the laws of Physics don't vary depending on how much inertia an object has. This is important because everything has some amount of inertia. Standing on the surface of the earth, we feel that we are not in motion, but because the earth is moving, so are we. If we measure the speed of a ball thrown atop a train, we can either measure the speed of the ball with respect to the train’s motion or with respect to the motion of the Earth.


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Centrifugal Force (Brightstorm)

The centrifugal force...is it a real force?

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Rotational Speed (Brightstorm)

Distinction between rotational speed and linear (tangential) speed.

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Brightstorm: Centripetal force

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Tides

Tides are caused by gravitationnal force of the moon on the earth.

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Brightstorm: Gravity Overview

Introduction to gravitational force.  Distinction between mass and weight.  How to calculate weight from mass.

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Brightstorm: Free-Body Force Diagrams

Some very basic free-body diagrams:  book at rest on a table, falling balloon, book in motion on a table.

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Rotation and Revolution

Distinction between rotation and revolution.

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Hooke's Law (Brightstorm)

Three simple examples involving Hooke's Law (force exerted by a spring).

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