Final answer:
An example of work being transformed into kinetic energy is when a baseball is hit by a bat. Heat transfer can occur between a hot coffee and the surrounding air; work as pushing a block, and internal energy in the coffee's thermal energy. Food energy is molecular potential energy that can be converted into kinetic energy or other forms during metabolism.
Step-by-step explanation:
For the transformation where work (W) is converted into kinetic energy (K), a specific example is a baseball being struck by a bat. When the batter applies force to the baseball, work is done on the ball, which then gains kinetic energy as it moves through the air. This demonstrates the work-energy theorem, which states that work done on an object changes its kinetic energy.
Concerning question 3 about energy types, here's how to differentiate them with examples:
- Heat transfer (Q) is an energy in transit example when a hot cup of coffee transfers heat to the surrounding air.
- Work (W) occurs when a force causes a displacement, such as pushing a block along a surface.
- Internal energy (U) is shown in the energy stored within the coffee due to the molecular motion (thermal energy).
Heat transfer and internal energy differ in that internal energy is stored within a system, whereas heat is the energy transfer due to temperature difference and can't be stored as such.
If you run down stairs and stop, your kinetic energy dissipates, often as thermal energy due to friction, while your gravitational potential energy decreases since you've moved to a lower elevation.
Food energy (calories) represents molecular potential energy that, when metabolized, can be transformed into kinetic energy for movement or converted into other forms of energy within the body.