Ruff Ruffman loves to explore the world through science and engineering. You can explore the concept of friction by conducting an investigation using a toy car and ramp. See what you need to get racing: http://bit.ly/2DQrmFw
Let us know what else you incorporated into your ramps by commenting below.
PBS KIDS and the PBS KIDS Logo are registered trademarks of PBS. Used with permission. The contents of this video were developed under a grant from the Department of Education. However, those contents do not necessarily represent the policy of the Department of Education, and you should not assume endorsement by the Federal Government. The project is funded by a Ready To Learn grant (PR/AWARD No. U295A150003-16, CFDA No. 84.295A) provided by the Department of Education to the Corporation for Public Broadcasting.
