" "In-class activities: Make a pendulum and count the cycles that occur in a minute at two lengths, one short, one medium and one long. Record the length (e.g, by tracing the short pendulum on your paper, by measuring the medium pendulum against your textbook, etc.). Time things with the pendulum: Time a marble down a one-nickel incline using the short pendulum. Time a marble down a one-nickel incline using the long pendulum. Time a marble down a one domino incline using the short pendulum. Time a marble down a two domino incline using the long pendulum. Can you distinguish between a one-domino incline and a two-domino incline using the short pendulum? Yes Can you distinguish between a one-domino incline and a two- dominoincline using the long pendulum? no What is the percent difference between 5.5 and 8? 8-5.5=2.5/8=-3x100+%= 30% difference What is the smallest possible percent difference you think you could detect, using the pendulum, in the times required for the ball to travel down two ramps? smallest percent difference could be .00001% difference?