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# Phys 103, Velocity

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Author: Jesse Olson
##### Description:

Relate velocity, displacement (distance), and time to each other.
Solve equations for velocity, time, and displacement.
Differentiate between speed and velocity, and distance and displacement.

This packet introduces the concept of velocity and how it relates to speed. Vector quantities are differentiated from scalar quantities, as these are often used interchangeably in non-scientific realms.

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Tutorial

## New words for this packet

Velocity - An objects speed in a particular direction.  This is a vector which includes a numeric speed value AND a direction.

Displacement - A vector value of how far an object is from its starting point.

Initial Position/Final Position - The beginning location of an object and the ending location of that same object.  Used to find displacement.

Delta Time (Δt) -  The change in time.  Found by subtracting the initial time from the final time.

Heads Up: Get used to seeing the delta (Δ) symbol and KNOW that it means "change in".  You will see it a lot in physics!

Source: olson

## What is velocity?

This slide show introduces some of the important aspects of velocity. There are also 3 example problems illustrating typical questions seen in this topic area.

Source: olson

## Some helpful (I hope) information

The complexity of velocity problems can be increased if the motion is not straight line.  In these cases,  you will need to use vectors to solve the problems.  If you are not great with vectors you may wish to visit a packet such as this one http://sophiau.com/packets/1042

Also, be aware of the units used in physics problems!  50 km/s IS NOT the same as 50 m/s.  You may have to change the units of a given number PRIOR to solving the problem.

Good luck and if you need help that Google can't supply, send me a question!

Source: olson