Question

snow day
some researchers were given the task of determining which factors affect downhill snow sledding speed at a public park. on day 1, a sledder rode three different types of sleds down a snow - covered hill from starting heights of 30, 60, and 90 meters (m). the combined mass of the sledder and each sled was 80 kilograms (kg). the sledder wore a helmet for safety.
on day 2, the sledder and researchers returned to the same hill to continue collecting data. the snow had melted slightly and then had frozen again overnight. the snow - covered area was more like a solid sheet of ice than the fresh snow from the day before. on day 2, the timing of sled 3 was not completed because heavy rain started.
the table below shows the data collected on sled speed in relation to the different starting heights on the hill. each sled speed indicates the average speed at which the sled traveled from the starting height on the hill to the bottom of the hill.
sled data

starting height on the hill (m)	day 1 sled speed (m/s)	day 2 sled speed (m/s)
	1	2	3	1	2	3
30	15	15	9	17	17	?
60	21	22	13	24	25	?
90	26	26	16	29	28	?

use the drop - down menu to correctly complete the sentence based on the sled data table from the passage.
at the starting height of 90 m, the sledder

Explanation:

Potential energy is given by the formula $PE = mgh$, where $m$ is mass, $g$ is gravitational - acceleration, and $h$ is height. As the height changes, potential energy changes. At 90 m, the height is different from 30 m and 60 m, so the potential energy is different. The text mentions the combined mass of the sledder and sled is constant, so the mass of the sled doesn't change each time. And there's no indication the same sled was used each time on both days.

Answer:

had a different potential energy than at 60 m