Question

1. a stone that starts at rest is in free fall for 8.0 s. a. calculate the stones velocity after 8.0 s. m/s

Explanation:

Step1: Identify the relevant formula

The formula for the velocity of an object in free - fall is $v = v_0+gt$, where $v_0$ is the initial velocity, $g$ is the acceleration due to gravity ($g = 9.8\ m/s^2$ on Earth), and $t$ is the time.

Step2: Determine the values of variables

The stone starts at rest, so $v_0 = 0\ m/s$, $g = 9.8\ m/s^2$, and $t = 8.0\ s$.

Step3: Substitute values into the formula

$v=0 + 9.8\times8.0$
$v = 78.4\ m/s$

Answer:

$78.4$