Question

1. a potato cannon launches a 0.2 kg potato 30 meters into the sky. what is the potential energy of the potato before it comes back down? m = ____ g = __ h = __ pe = ____

Explanation:

Step1: Identify the formula

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

Step2: Substitute the given values

We are given that $m = 0.2\ kg$, $h=30\ m$, and $g = 9.8\ m/s^{2}$. Substitute these values into the formula: $PE=(0.2\ kg)\times(9.8\ m/s^{2})\times(30\ m)$.

Step3: Calculate the potential energy

$PE = 0.2\times9.8\times30\ J= 58.8\ J$.

Answer:

$58.8\ J$