EO3: Non-Contact Forces

Front

What is a non-contact force?

Back

A force that can act on an object without physical contact, such as gravitational, magnetic, and electric forces.

Front

What is a magnetic field?

Back

An area around a magnet where magnetic forces can be detected, often visualized using iron filings.

Front

What happens when you sprinkle iron filings around a magnet?

Back

The iron filings align along the magnetic field lines, showing the pattern of the magnetic field.

Front

What is an electric field?

Back

An area surrounding an electric charge that exerts a force on other charges within the field.

Front

Where is the magnetic field strongest around a magnet?

Back

The magnetic field is strongest at the poles of the magnet.

Front

Which materials are typically magnetic?

Back

Iron, nickel, and cobalt are common magnetic materials.

Front

What is kinetic friction?

Back

A force that opposes the motion of two surfaces sliding past each other; it cannot act from a distance.

Front

What is the difference between magnetic and electric fields?

Back

Magnetic fields are produced by magnets and moving charges, while electric fields are produced by stationary charges.

Front

What is gravity?

Back

A non-contact force that attracts two bodies towards each other, proportional to their masses and inversely proportional to the square of the distance between them.

Front

Can electric fields act at a distance?

Back

Yes, electric fields can exert forces on charges without direct contact.