High Road, Low Road
![Two cars at the top of a ramp that has two roads one being steeper than the other.](/media/libraries/college-of-science-and-engineering/physics/images/demo-images/HILO1.jpg)
PIRA 1D15.20
Materials: 1 Ramp with High and Low Road, 2 Cars of Equal Mass, 1 Wood Box
Tell students that you will release two identical Hot Wheels cars simultaneously at the top of the high-road-low-road device shown above. Ask the students which one will reach the bottom first, or if it will be a tie. If this is done after a discussion of conservation of energy, many will expect a tie and be surprised when the car on the low road wins.