olivia is on a swing at the playground. if the swing is moving from w to z, at which point is her kinetic…
olivia is on a swing at the playground. if the swing is moving from w to z, at which point is her kinetic energy increasing and her potential energy decreasing? (based on a starting point of w) o w o x o y o z
Answer
Explanation:
Step1: Recall energy - conversion concept
As an object moves downwards in a gravitational - field, its potential energy $PE = mgh$ (where $m$ is mass, $g$ is gravitational acceleration, and $h$ is height) decreases and its kinetic energy $KE=\frac{1}{2}mv^{2}$ (where $v$ is velocity) increases.
Step2: Analyze the positions
Starting from point $W$, as Olivia moves from $W$ to $X$, she is moving downwards. Her height $h$ is decreasing, so her potential energy is decreasing. At the same time, her speed $v$ is increasing, so her kinetic energy is increasing.
Answer:
X