It is perfectly OK to make an incorrect hypothesis scientists do this all the time. The only thing you could do wrong if you make an incorrect hypothesis is if you change your observations to match your hypothesis instead of changing your hypothesis to match your observations. Record information to be compared with conclusions after conducting the experiment. Here are some questions you might want to think about before you begin your experiment. Procedural Steps for Conducting the Swing Set Physics Investigation 1.
Large mass can be an adult.
Using a bathroom scale, measure mass of the large mass and of the small mass. Measure the length of the pendulum. An adult may need to measure the length of the swing chains. If no measurement is available, use long for the longest, short for the shortest swing. Record length on report form.