Resonance

Introduction: I’m doing two demonstrations on resonance. I will see how one moving object can cause a still object to move and resonate.

Materials:

-3 springs, 2 of the same size and 1 different

-3 Weights of 200 grams

-3 Weights of 100 grams

-String

-2 poles to hold all 3 springs and weights

Procedures: In the first demonstration I will attach the 3 springs to the pole and attach 200g weights to the ends of each of them. I will pull on the first spring and it will cause the 3^rd spring to start moving and after about 2 minutes both of the springs will be moving at the same speed and resonating. In the second demonstration I will attach string from the first pole to the second pole. I will attach 3 more pieces of string to that string, 2 pieces of the same size and 1 different. I will attach 100g weights to the ends of each of them. I will push the first weight and after about 2 minutes the third weight will be moving at the same speed and direction as the first weight due to resonance.

Scientific Principle: Oscillation is the scientific principle behind these demonstrations. It is a type of periodic motion that creates a movement like a pendulum, that makes objects rock back and forth or up and down.

Safety Regulations: Be careful when handling the weights; do not drop them on yourself. When tying the string to both ends of the poles make sure to tie tightly to avoid loose string and the swinging of weights that can harm someone.