Interactive Lecture Demonstrations

 Prediction Sheet—Kinematics 1—Human Motion

 

Directions:  This sheet will be collected.  Write your name at the top to record your presence and participation in these demonstrations.  Follow your instructor's directions.  You may write whatever you wish on the attached Results Sheet and take it with you.

 

Demonstration 1:  Sketch below on the left axes your prediction of the distance (position)-time graph for a person moving away from the origin (the motion detector) at a steady (constant) velocity.  On the other axes sketch your prediction for a person moving toward the origin at a steady (constant) velocity.

           

 

 

 

 

 

Demonstration 2:  Sketch on the left axes below your prediction of the velocity-time graph for a person moving away from the the orgin (the motion detector) at a steady (constant) velocity.  On the other axes sketch your prediction for a person moving toward the orgin at a steady (constant) velocity.

                    

 

 

 

 

Demonstration 3:  Sketch on the axes below your predictions for the distance-time and velocity-time graphs of a person moving away from the motion detector at approximately twice the speed of Demonstration 1 and  Demonstration 2.

 


                                                                                          Describe in words how the distance-time

                                                                                          graph changes when the speed is twice

                                                                                          as fast.

 

 

 

                                                                                         

                                                                                          Describe in words how the velocity-time

                                                                                          graph changes when the speed is twice

                                                                                          as fast. fast

 

 

Demonstration 4:  Sketch on the axes below using a dashed line your prediction of the velocity-time graph produced when a person—

            • walks away from the motion detector slowly and steadily for 6 seconds

            • then stands still for 6 seconds

            • and then walks toward the motion detector steadily about twice as fast as before

 

Compare your prediction with your neighbor(s), and see if you can agree.  Sketch in the prediction you agreed on using a solid line.

 

 

 

 

 

 

 

 

 


           

 

 

Predict the distance (position)-time graph for the motion described above with a dashed line on the axes below.  (Align the distance and velocity graphs correctly in time.) 

 

Again, sketch in the prediction you agreed on with your neighbor(s) using a solid line.