Physical Science Activities Manual ________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________ Center of Excellence for Science and Mathematics Education at The University of Martin sheet of sandpaper. Tape next to it sheets of paper so that they equal the thickness of the sandpaper. Place the sandpaper/paper boundary at an angle of 45° with the long axis of the cardboard ramp. Now allow the wheels to roll down the ramp. Make sure that they will hit the boundary between the sandpaper and regular paper. Notice what happens when the leading edge of the first wheel hits the different surface. If it is going from paper to sandpaper it will veer one way because its speed is changing (slowing down). If it is going from the sandpaper to the paper it will veer the other way because its speed is changing (speeding up). In the first case it turns toward the
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