Energy Test

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. It is the energy that has the potential to be converted into kinetic energy.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. It depends on the mass of the object and the square of its speed.

Front

How is kinetic energy calculated?

Back

Kinetic energy (KE) is calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy increases with an increase in mass. Doubling the mass of an object will double its kinetic energy if speed remains constant.

Front

What is the effect of speed on kinetic energy?

Back

Kinetic energy increases with the square of the speed. Doubling the speed of an object will quadruple its kinetic energy.

Front

What is energy transformation?

Back

Energy transformation is the process of changing energy from one form to another, such as electrical energy to mechanical energy.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It occurs when two surfaces come into contact.

Front

How does friction affect energy?

Back

Friction converts kinetic energy into thermal energy, causing objects to slow down and eventually stop.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of an object. It is the total kinetic energy of the particles in an object.

Front

What is an example of energy transformation in everyday life?

Back

An example is an electric pencil sharpener, which transforms electrical energy into mechanical energy to sharpen pencils.