INVISIBLE RULER
Rustam Sardarli
Teacher: Ms. Molly MacManus
ABSTRACT
Have you ever measured a piece of
rope without a ruler? I agree, it doesn’t make any sense. But it sure is possible!
Anyone can measure the length of a piece rope, even if the person can only see
one end of it! However, this idea can only be used if one end of the rope is
fixed to something and a load is on the other end. This simple machine would be
called a pendulum. Under the weight of the load, the pendulum would stay still
in a vertical position.
After you apply some force to one
side of the pendulum it would start to swing back and forth (vibrating)
changing the pendulums original vertical position by a small angle. I studied
how the length of the rope, the mass, and the angle of revolution effect on the
vibration of the pendulum. I used a
physical formula to determine the length of a pendulum without measuring it with
a ruler.
CONTENT:
Initial
Observation and Hypothesis