The Work-Energy Theorem is an important idea in physics. It says that the work you do on an object changes its kinetic energy, which is the energy it has while moving.

Let’s look at a couple of simple experiments to understand this better:

1. Sliding Block Experiment:

   • Take a block and push it on a flat, smooth surface where there is no friction.
   • You will use a constant force to push the block.
   • Measure how far the block goes and how hard you pushed it.
   • The work done can be calculated using the formula: Work (W) = Force (F) × Distance (d).
   • This work shows us how much the block's kinetic energy increases. The formula for kinetic energy is: KE = 1/2 × mass (m) × velocity (v)².

2. Pendulum Swing:

   • Take a pendulum and lift it to a high point, then let it go.
   • At the top, it has the most potential energy. The formula for potential energy is: PE = mass (m) × gravity (g) × height (h).
   • As the pendulum swings down, that potential energy changes into kinetic energy. This is a great example of how energy is conserved.

These experiments clearly show how work and energy are connected!