A student designs a toy car by adding rubber wheels to a box. Attached to the top of the box is a thick paper rectangle. When the paper is aligned with the box (Figure 1), the car covers a long distance when pushed. When the paper is perpendicular to the box (Figure 2), the car covers less distance when given the same push. Why does the toy car cover less distance when the paper is perpendicular to the box?

transverse waves oscillate in one direction while traveling in another. compressional, or longitudinal waves, oscillate “three steps forward, two steps back” in the same direction as the overall direction of travel.

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

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