Question

a 21.0 kilogram third grader climbs up the 1.8 meter tall ladder to get to the top of a slide. just before she pushes off to slide down, calculate the amount of potential energy she possesses. answer:

Explanation:

Step1: Recall Potential Energy Formula

The formula for gravitational potential energy is $PE = mgh$, where $m$ is mass, $g$ is acceleration due to gravity ($9.8\ m/s^2$), and $h$ is height.

Step2: Identify Given Values

Mass $m = 21.0\ kg$, height $h = 1.8\ m$, $g = 9.8\ m/s^2$.

Step3: Substitute Values into Formula

$PE = 21.0\ kg\times9.8\ m/s^2\times1.8\ m$

Step4: Calculate the Result

First, multiply $21.0\times9.8 = 205.8$. Then, multiply $205.8\times1.8 = 370.44$ Joules.

Answer:

$370.44\ J$ (or approximately $370\ J$ depending on significant figures)