Question

the object has a mass of 7.0 kg. what is the potential energy of the object at point a? g = 10.00 m/s² height (m) vs. time (s) chart with time on x-axis (0 - 4 s) and height on y-axis (0 - 8 m), point a at height ~2 m options: 280 j, 140 j, 14 j

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, and $h$ is height.

Step2: Identify Values

Given $m = 7.0\ kg$, $g = 10.00\ m/s^2$, and from the graph, at point A, height $h = 2\ m$.

Step3: Substitute Values into Formula

Substitute $m = 7.0$, $g = 10.00$, and $h = 2$ into $PE = mgh$:
$PE = 7.0\ kg \times 10.00\ m/s^2 \times 2\ m$
$PE = 7.0 \times 10.00 \times 2$
$PE = 140\ J$

Answer:

140 J