Adolphin jumps out of the water. as it falls back down it a clerated at a rate of -9,8m/s^2 for 0.8 seconds of free fall. to calculate how far the dolphin fell, what equation will you use?

0.196 m

Explanation:

Given in the question that,

time taken by the dolphin to go back to water = 0.2 sec

To solve the question we will use Newton's Law of motion

here S is distance covered

u is initial speed

a = acceleration due to gravity

t = time taken

Plug value in the equation above

S = 0(0.2) + 0.5(-9.8)(0.2)²

S = 0.5(-9.8)(0.2)²

S = -0.196 m

Negative sign represent direction

(Assuming that dolphin have a vertical straight jump not a projectile motion)

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.