State and explain one example where

• (i) Kinetic energy is present in a body and is used;
• (ii) Potential energy is present in a body and is used

Energy exists in various forms, and two common types are kinetic energy and potential energy. Here’s a look at examples of each:

Kinetic Energy in Action

Consider a moving car on a highway. The car possesses kinetic energy due to its motion. This energy is utilized when the car accelerates to overtake another vehicle or when it navigates through turns. The faster the car moves, the more kinetic energy it has, which allows it to perform work, such as transporting passengers or goods efficiently.

Key Points about Kinetic Energy

• Kinetic energy depends on the mass and speed of the object.
• It is calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.

Potential Energy in Use

Now, let’s look at a roller coaster at the top of a hill. At this point, the roller coaster has gravitational potential energy because of its height above the ground. As it descends, this potential energy converts into kinetic energy, propelling the coaster forward at high speeds. The energy stored due to its position is what allows the ride to be thrilling and dynamic.

Understanding Potential Energy

• Potential energy is related to an object's position or state.
• It can be calculated using the formula: PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Both kinetic and potential energy play crucial roles in our daily lives, demonstrating the principles of physics in action.