Results: length (cm) time it takes for 10 swings time it takes for 1 swing 20 10.46 1.046 30 12.42 1.242 40 15.90 1.590 50 16.87 1.687 60 17.23 1.723 70 17.57 1.757 80 18.84 1.884 Hypothesis My hypothesis is that as the length of the pendulum increases the time it takes to swing will increase. As the length increases it will loose time due to the oscillation happening. I believe the reason is because it takes longer to complete the cycle. An example are the swings, if the length of the string would’ve been shorter, the time for it to stop working would’ve been a lot faster than a longer string. The independent variable in this experiment is the length of the strings and the variable we’re going to measure if the time it takes for 1 swing. - gravity inertia ….. Variables: length of the pendulum, Independent: length of the string Dependent; time it takes for 1 swing Controlled: string, timer, ruler and a cookie cutter (mass of the bob at the end of the pendulum) hypothesis 1) how the length of a pendulum affects the time it takes to swing 2) The length of a pendulum affects the time it takes to swing by its size. I think that if the length of the pendulum increases the time it takes will increase and if the length of the pendulum decreases the time it takes will decrease. General knowledge without research: what i've learned about this experiment is that the length of objects can manipulate their speed or time Knowledge from the internet: “Pendulums are used to regulate the movement of clocks because the interval of time for each complete oscillation called the period is constant”.