Question

7 a kid took a brand new iphone out of its case and held it 2 meters off the ground. if an iphone has a mass of 0.14 kg, what is the potential energy it has to fall to the ground? m = ____ g = __ h = __ pe = ____

Explanation:

Step1: Identify the formula

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

Step2: Substitute the values

Given $m = 0.14\ kg$, $g = 9.8\ m/s^{2}$, and $h = 2\ m$.
$PE=0.14\times9.8\times2$.

Step3: Calculate the result

$PE = 0.14\times19.6=2.744\ J$.

Answer:

$2.744\ J$