This is a follow-up to Question #342 and Question #343.
Shown in the photograph below is the Vernier ultrasonic motion detector system with software connected to a computer seen in the right side of the photograph. The ultrasonic range finder measures the time taken for a short burst of ultrasound emitted by the source to reflect off the styrofoam block which I am holding and return to the source, which also acts as a detector. That time is converted into a distance an plotted by the motion detector software. The velocity vs. time graph is obtained from the measured distance vs. time data.
Shown below are more complex graphs of (a) d(t) and (b) v(t) versus t, where t is the time in seconds, d(t) is the position, and v(t) is the velocity.
(a) |  |
(b) |  |
Identify from among the following motion videos:
the correlations of the videos with the two graphs above.
The correlations are:
Click here for Answer #344 after April 20, 2009.
