01: the students decide to investigate how the mass of each marble affects its kinetic energy. the students will
rolf each marble down the first hill on the track. they will then compare the results for the kinetic energy of
both the ceramic marble and the steel marble.
which figure best compares the kinetic energy of each marble when the marbles roll down the hit on the
track?

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.