Forces and Motion

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies towards each other, commonly experienced as the force that pulls objects towards the Earth.

Front

What is magnetism?

Back

Magnetism is a noncontact force that attracts certain metals, such as iron, and is produced by magnets.

Front

What is a force?

Back

A force is a push or pull that can cause an object to move, stop, or change direction.

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is the role of oil in machines?

Back

Oil reduces friction between the moving parts of a machine, allowing it to work more efficiently.

Front

What happens when two forces are equal and opposite?

Back

When two forces are equal and opposite, they cancel each other out, resulting in no movement.

Front

How can you increase the distance a ball travels when thrown?

Back

You can increase the distance by increasing the force used to throw the ball.

Front

What is the difference between contact and noncontact forces?

Back

Contact forces require physical contact between objects, while noncontact forces act at a distance without direct contact.

Front

What is an example of a contact force?

Back

Friction is an example of a contact force, as it occurs when two surfaces rub against each other.