Question

what is the displacement of the dolphin in that time?

Answer 1

Given:

The acceleration of the dolphin is

$a=1.77\text{ m/s}^2$

The time taken by the dolphin is

$t=3.33\text{ s}$

The velocity of the dolphin at the end is

$v=8.77\text{ m/s}$

Required: the displacement of the dolphin

Explanation:

The displacement of the dolphin can be calculated by the third equation of motion. that is given by

$s=ut+\frac{1}{2}at^2$

we assume that the initial velocity of the dolphin is zero u=0.

plugging all the values in the above equation, we get

$\begin{gathered} s=0\times3.33\text{ s+}\frac{1}{2}\times1.77\text{ m/s}^2\times(3.33\text{ s})^2 \\ s=9.81\text{ m} \end{gathered}$

Thus, the displacement of the dolphin is

$9.81\text{ m}$