Find the frequency at which the amplitude is maximum at each rod. What is the relationship between thickness and resonant frequency?
Let’s combine various gears by dragging the screen. How can I combine to speed up? How can I combine to slow it down?
What are the factors that affect the cycle of the spring pendulum? (The effect of reducing the amplitude by friction is ignored.)
What happens if you punch a long hole in the earth and then drop the object? By the way, is this really possible? How long does it take to get to the other side?
Why does a rolling object go down slower than an object that slides down?