Activity No. 1: What is Friction? Procedure: Materials: Ramps, Measuring tape or ruler, marble, and sandpaper. 1. With the help of your family member. Set the ramp marble shown in the figure 2. Release the marble and measure the distance covered by the marble. support 3. Set the ramp again, but this time place the sandpaper below the ramp. 4. Measure the distance travel by the marble. ramp floor Think about this! Q1: How will you compare the distance traveled by marble, without sandpaper and with sandpaper? Q2. How will you relate the activity to inertia and friction​