The coaster begins with a nearly 2.9 second free fall along a 90 degree drop. what is the speed?

vf=28.449m/s~28.4m/s

Explanation:

vi=0m/s (initial velocity)

a=g=9.81m/s² (acceleration due to gravity)

vf=? (final velocity) ‐ unknown

t=2.9s (time)

equation (velocity equation) vf=vi×t+a×t

vf=0m/s×2.9s+9.81m/s²×2.9s

vf=28.499m/s~28.4m/s

e/c, where e is its total energy

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it