ODK - Velocity

Velocity

Before determining the motion of an object we must determine the frame of reference. This is defined as the point that is not moving. Commonly we use the surface of the earth. This allows us to define the distance and displacement that an object moves. Distance is the length of the pathway and displacement is the straight line distance between the starting and ending points. This allows us to determine the difference between speed, distance divided by time, and velocity, displacement divided by time. Please look through the following presentation that explains displacement and velocity.

*Note for the presentation below: There is an incorrect pronunciation of the word "Translational" on page 4 in the 4th bullet. Transitional is not correct and should be read as Translational.

Velocity Practice

We will now practice solving problems using the equations and concepts you learned in the velocity presentation. Be sure to think through the physics of what is happening before you start putting numbers into equations. The physics concepts determine the math that you do! The presentation will give you time to work through the problems, find a solution, and check your work. The presentation may take a few moments to load.

Velocity Self-Assessment

Now it is your turn. Complete the self-check questions to verify that you understand the relationship between displacement and velocity.

A woman drives her sports car east for 300 s at 24 m/s. She stops at a red light for 120 s then finishes her short trip by driving for 360 s at 28 m/s.