# Different types of energy: kinetic vs potential vs

• csurfus1
In summary, the conversation discusses the type of energy a blackboard eraser has when held steady three feet above the ground. The options provided are potential energy, kinetic energy, electrical energy, and spring elastic energy. One person suggests it is kinetic energy since the eraser is not moving, while another person explains that potential energy is also present due to the eraser's relative height. The concept of potential energy is described as having the potential to transform into kinetic energy.
csurfus1
1. Homework Statement

What type of energy does a blackboard eraser have when I hold it steady three feet about the ground?

a. potential energy
b. kinetic energy
c. electrical energy
d. spring elastic energy

I think it is kinetic energy. But I am confused on the differences of types of energies.

Kinetic energy is what an object has when it is moving, so if you hold the eraser steady, it's kinetic energy will be equal to zero.

Think about what would happen if you let go of the eraser.

1 person
Tell us what do you know about the 4 types of energies.

It's potential energy while it is still. and then kinetic if you start moving the eraser.

It's potential only if it has a relative height associated with it. For example, if the reference point is the floor and the eraser is held still on the floor then the kinetic energy is zero but the potential energy is also zero.

So being still is not itself the reason for something having potential energy. Think of potential energy as having the potential to transform into kinetic energy.

## 1. What is kinetic energy?

Kinetic energy is the energy an object possesses due to its motion. It is dependent on the object's mass and velocity, with the formula KE = 1/2 * m * v^2, where m is mass and v is velocity.

## 2. What is potential energy?

Potential energy is the energy that an object has due to its position or state. It is stored energy that can be converted into other forms of energy. Examples of potential energy include gravitational, elastic, and chemical energy.

## 3. What is the difference between kinetic and potential energy?

The main difference between kinetic and potential energy is that kinetic energy is the energy of motion, while potential energy is the energy of position or state. Kinetic energy is dependent on an object's mass and velocity, while potential energy is dependent on an object's position or state and the forces acting on it.

## 4. How are kinetic and potential energy related?

Kinetic and potential energy are related through the principle of conservation of energy. This states that energy cannot be created or destroyed, only transferred between different forms. For example, when an object falls, its potential energy decreases while its kinetic energy increases.

## 5. What are some examples of kinetic and potential energy?

Some examples of kinetic energy include a moving car, a person running, or a spinning top. Examples of potential energy include a boulder at the top of a hill, a compressed spring, or a battery with stored chemical energy.

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