Question

1. calculate the gravitational potential energy of a 70 kg boy is sitting 3 m from the ground in a tree. 2058 j 480 j 210 j 21.43 j

Explanation:

Step1: Identify the formula

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

Step2: Substitute the values

Given $m = 70\ kg$, $g = 9.8\ m/s^{2}$, and $h = 3\ m$. Then $U=70\times9.8\times3$.

Step3: Calculate the result

$U = 70\times9.8\times3=2058\ J$.

Answer:

2058 J