Which would be the best example to demonstrate the principle of conservation of energy?
a stone is crushed
light bends around a sharp edge
a pendulum swings back and forth
a balloon inflates when air is blown into it
The best example to demonstrate the principle of conservation of energy would be a pendulum swinging back and forth. In a pendulum, the potential energy is converted into kinetic energy as it swings downwards, and this kinetic energy is then converted back into potential energy as it swings upwards. Throughout its motion, the total amount of energy remains constant, illustrating the principle of conservation of energy.
The best example to demonstrate the principle of conservation of energy would be a pendulum swinging back and forth.
In a pendulum, energy is transferred between kinetic energy (motion) and potential energy (height). As the pendulum swings upward, it gains potential energy while losing kinetic energy. At the highest point, all of the kinetic energy is converted to potential energy. As it swings back downward, the potential energy is converted back to kinetic energy. Throughout the swing, the total mechanical energy (the sum of kinetic and potential energy) remains constant, showcasing the principle of conservation of energy.