Students in Ms. Barrett's science class visited a vehicle crash-test facility. The students observed four different types of vehicles crash against a guard-rail barrier at the end of a 45-meter track as shown in the diagram below. They recorded information about each crash test in the table below. {img:images/States2017/AZ/AZ_Gr8_2008_5.png} What was the velocity (v = d/t) of vehicle 4 when it crashed into the guard rail?

3.0 meters per second west


A sound is heard when you pluck a string on a guitar. What will happen to the sound if the same string is plucked harder?

The pitch will stay the same, and the volume will be higher.


Several interchangeable parts are used in the manufacture of automobiles. Some examples of these parts are batteries, windshield wiper blades, spark plugs, and tires. Which of the following is an advantage of interchangeable parts over non-interchangeable parts on automobiles?


Interchangeable parts can fit many kinds of automobiles.