Question

an apple with a mass of 0.15 kg rests on the edge of a desk 0.65 m at floor. given that the acceleration due to gravity is 9.8 m/s², what is the potential energy?
a. 0.01 j
b. 0.31 j
c. 0.96 j
d. 2.26 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, and $h$ is the height.

Step2: Substitute the values

Given $m = 0.15\ kg$, $g=9.8\ m/s^{2}$, and $h = 0.65\ m$. Substitute these values into the formula: $U=0.15\times9.8\times0.65$.

Step3: Calculate the result

$U = 0.15\times9.8\times0.65=0.9555\ J\approx0.96\ J$.

Answer:

C. 0.96 J