Question

identifying mechanical energy which image shows both potential and kinetic energy?

Explanation:

To solve this, we analyze each image:

1. First Image (Pendulum at lowest point): At the lowest point of a pendulum’s swing, it has maximum kinetic energy (due to motion) but minimum potential energy (lowest height). So, it’s mainly kinetic.

1. Second Image (Pendulum in motion, not at extremes): A pendulum moving between its highest and lowest points has both:

• Kinetic energy: Because it’s moving (speed is non - zero, so $KE=\frac{1}{2}mv^{2}$ is non - zero).
• Potential energy: Because it’s at a height above the lowest point (so $PE = mgh$ is non - zero, where $h>0$ relative to the lowest point).

1. Third Image (Pendulum at highest point, held): If held at the highest point, it’s at rest (so $KE = 0$) and has maximum potential energy (due to height). So, it’s mainly potential.

The image that shows both potential and kinetic energy is the second one (the middle image of the three pendulum diagrams).

Answer:

The middle image (the one with the pendulum swinging between the highest and lowest positions).