What to do First make a ramp laying the book down and placing the ruler on the edge creating a ramp. Place masking tape at the end of the ruler (starting point). Measure 180cm place masking tape (finish point). Roll a marble down a ramp. Time how long it takes to move 180 cm. Find the speed. Speed = distance divided by time
Predict Predict how raising the ramp would change the speed. Test your prediction by assing one book.
Explain Your Results 1.Interpret Data: Make a bar graph to show your results. 2. Infer: How did raising the ramp change the speed of the marble.