Chapter 3: Problem 8

Give four examples of potential energy. In each case, how can the potential energy be converted into kinetic energy?

Short Answer

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The four examples of potential energy are: 1. Gravitational potential energy of an object placed at height can be converted into kinetic energy when the object is dropped. 2. Elastic potential energy in a stretched spring is converted into kinetic energy when the spring is released. 3. Chemical potential energy stored in fuel is converted into kinetic energy when the fuel undergoes combustion. 4. Electric potential energy in a capacitor is converted into kinetic energy when the capacitor is discharged.

Step by step solution

Identifying Examples of Potential Energy

Potential energy is the stored energy an object has because of its position or state. Let's start by identifying four examples of potential energy, which can be: 1. Gravitational potential energy of an object held at height. 2. Elastic potential energy in a stretched or compressed spring. 3. Chemical potential energy stored in fuel. 4. Electric potential energy stored in a charged capacitor.

Converting Potential Energy into Kinetic Energy: Example 1

In the case of gravitational potential energy, it can be converted into kinetic energy by dropping the object. When the object is falling, the height is reducing which lessens the gravitational potential energy, while the speed (and therefore kinetic energy) of the object is increasing until it hits the ground.

Converting Potential Energy into Kinetic Energy: Example 2

Elastic potential energy can be converted into kinetic energy by releasing the spring. When the spring is released, it will move rapidly, and its stored potential is converted into kinetic energy.

Converting Potential Energy into Kinetic Energy: Example 3

Chemical potential energy is stored in fuels and can be converted into kinetic energy by burning the fuel. The chemical reaction releases energy that can be used to do work, like moving a car, which is essentially converting potential energy into kinetic energy.

Converting Potential Energy into Kinetic Energy: Example 4

The electrical potential energy in a capacitor can be converted into kinetic energy by allowing discharge. The energy stored in the charged capacitor can be used to power electrical devices, resulting in the motion of electrons, which consist of kinetic energy.

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Give four examples of potential energy. In each case, how can the potential energy be converted into kinetic energy?

Short Answer

Step by step solution

Identifying Examples of Potential Energy

Converting Potential Energy into Kinetic Energy: Example 1

Converting Potential Energy into Kinetic Energy: Example 2

Converting Potential Energy into Kinetic Energy: Example 3

Converting Potential Energy into Kinetic Energy: Example 4

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