8th Midterm Review

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the definition of force?

Back

Force is a push or pull on an object resulting from the object's interaction with another object, measured in Newtons.

Front

What happens to sound waves when they reflect off a surface?

Back

When sound waves reflect off a surface, they bounce back, which can create an echo.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy increases with the mass of the object; doubling the mass of an object will double its kinetic energy if the velocity remains constant.

Front

What is the significance of the direction of force in Newton's Third Law?

Back

The direction of the force is crucial because it determines how objects interact; forces always occur in pairs acting in opposite directions.

Front

What is an example of sound wave reflection?

Back

An example is hearing an echo when sound waves bounce off a distant wall.

Front

How does increasing the number of wire turns affect an electromagnet?

Back

Increasing the number of wire turns around the core increases the strength of the magnetic field produced.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).