What Type of Energy Does a Blackboard Eraser Have?

In summary, the blackboard eraser has potential energy when held steady three feet above the ground because work was done to lift it up, storing energy that can be released as kinetic energy when it is let go. The other types of energy mentioned, such as kinetic energy and electrical energy, do not apply in this scenario.
  • #1
csurfus1
12
0

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

Homework Equations



none.

The Attempt at a Solution



I think it is kinetic energy. But I am confused on the differences of types of energies.
 
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  • #2
Why do you think it has kinetic energy?
 
  • #3
Potential Energy (Gravitational potential energy)
It does not have Kinetic energy because it is not in motion in your frame. (K.E = 1/2mv^2)

It does have Potential energy since you have done work (put energy into the system) in lifting the eraser up. That energy is stored as potential energy P.E = mgh ready to be released as kinetic as soon as you let the eraser go.
 

FAQ: What Type of Energy Does a Blackboard Eraser Have?

1. What is the energy source of a blackboard eraser?

The energy source of a blackboard eraser is mechanical energy, which is produced by the physical movement of the eraser.

2. Is the energy in a blackboard eraser renewable or non-renewable?

The energy in a blackboard eraser is considered non-renewable, as it is derived from the physical movement of the eraser and will eventually run out.

3. How is the energy in a blackboard eraser used?

The energy in a blackboard eraser is used to physically remove markings from a blackboard through friction and pressure.

4. Can the energy in a blackboard eraser be converted into other forms?

Yes, the mechanical energy in a blackboard eraser can be converted into other forms such as heat and sound energy, as well as potential and kinetic energy during its movement.

5. Is the energy in a blackboard eraser harmful to the environment?

The energy in a blackboard eraser is not considered harmful to the environment as it is a small amount and does not produce any harmful byproducts. However, the materials used to make the eraser may have an impact on the environment if not disposed of properly.

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