[Physics Tips] Vector vs Scaler

student,

Welcome to another issue of Physics Tips Daily - the free eZine to provide tips and tricks for students to survive and excel in physics.

Today's topic is about vectors.

Vectors are extremely important in physics. A vector is any quantity that has magnitude (size) and direction. An example would be 9.8m/s/s down, 20 km/hr North, 8 Tesla out of the page. They are typically draw as arrows to indicate this directional nature.

Contrast this idea with a scalar, which is a quantity with only magnitude. An example would be 70 degrees Fahrenheit, 50 kg, 3 hours.

Vectors often represent things like forces, velocities, and fields. If there is more than one vector acting on some object, they must all be incorporated. This means the vectors must be added together. The saying that describes how vectors are added is "tip to tail" or "head to tail". This means you must place the arrow head part of one vector at the beginning of the next. The sum, or combination of vectors is called the resultant.

That should do it for today.

Keep it up with your study. "See" you tomorrow.

Meanwhile, Seize the Day!
Wayne Huang, PhD
http://www.RapidLearningCenter.com

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>> Physics Mastery = Core-Concepts + Problem-Solving + Super Review.
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