A pendulum is constructed from a 1.0-kg mass suspended from the ceiling, with a length of strong string long enough so that, when pulled about 40o from the vertical, the mass comes to nose level. The pendulum will be released from this position. The demonstrator is to remain absolutely still until the pendulum makes at least one full cycle. This very-simple-to-perform demo can be made very memorable by playing up the drama. The possibility of seeing the teacher’s blood will excite the class. It will even test one’s faith in the laws of Physics.
Related Resources:
Teacher Demo or Activity: Pop Rocks - What a Gas!
Categories: Lab/Student Activity, Teacher Demonstration
This activity allows students to explore the composition of the candy Pop Rocks by observing the reactions that take place when Pop Rocks are placed in water. read more
Teacher Demo/Student Activity: Glow Sticks
Categories: Lab/Student Activity, Teacher Demonstration
In this demonstration, students observe what happens to activated glow sticks when they are submerged in water at three different temperatures: cold, room temperature, and hot. Students will use... read more
Teacher Demo: Sock Mitosis
Categories: Teacher Demonstration
This demonstration is a great way for students to model the stages of mitosis. Images of the different stages in textbooks are static snapshots and many students have difficulty grasping the idea... read more