A car weighing 5000 kg newtowns 2nd law car crashes

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

i think the answer is a, hope this is right, that would be my best guess.

b.

hope this : )

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.