Forces - more than one force

6 important questions on Forces - more than one force

What is the zero position?

The length of a spring that ahs not been extended

When is the extension directly proportional to the force?

If  two variables increase of decrease in a fixed ratio

What is a spring constant?

Property of a spring that indicates how far the spring extends when a force is exerted on it
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What is the parallelogram method?

Method for finding the resultant when two forces have some arbitrary angle between them

Why can't you just add two forces that move in different directions to calculate the resultant?

Because the forces are vectors, the direction matters as well as the magnitude

How can you calculate the resultant if two forces are acting along the same line?

Just add or subtract them

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