1. The problem statement, all variables and given/known data We are to use the Ramp: Forces and Motion simulator located at http://phet.colorado.edu/en/simulation/ramp-forces-and-motion. First part we are to chose 2 objects. I chose the small crate and textbook and then slide then down a ramp at 30 degree angle. Using the following parameters: μs=0.5 μk=0.3 g=9.8m/s^2 Earth brick wall wood friction Hypothesis 1: If the mass of an object (blank), then the distance it slides from the end of the ramp will (blank) because........ After completed the simulation the 10 kg textbook and the 100kg small crate both go the same amount of distance. Hypothesis #2: If the angle of the ramp(blank), then the distance it slides off the end of the ramp will (blank) because......... In this experiment I used the same object (10kg textbook), at different angles ( 30 and 45 degrees). The book moved further when ramp was at 45 degree angle than 30 degree angle. 2. Relevant equations 1. How do I state the hypothesis 1 and hypothesis 2: Knowing that acceleration is inversely proportational to the mass, which has nothing to do with the distance traveled, I think. 2. Next I am to graph using the independent and dependent variables? Not sure which is which. I do know that the dependent variable is the y-axis and independent variable is the x-axis. 3. Then I am to derive a general formula relating the objects mass (m) and the distance it slide. And a formula for relating the angle and the distance it slides. Hope I didn't overwhelm you. 3. The attempt at a solution So here's what I know. a=acceleration F(net)= net force m=mass F(grav)=gravity force F(fric)= friction force not sure if I should add the two friction forces together of which one to chose and use) cos=cosine a=F(net)/m F(net)= F(grav)+F(fric)+F(norm) F(norm)=m*g*cosθ F(fric)=μ* F(norm) not sure which coefficient to use the kinetic friction or static friction. Don't know where to began. thank you for your attempt to help me.