Intro to forces

Front

What is a contact force?

Back

A force that requires physical contact between two objects, such as friction.

Front

What is a noncontact force?

Back

A force that can act at a distance without physical contact, such as gravity or magnetic force.

Tags

NGSS.MS-PS2-5

Front

What is friction?

Back

A contact force that opposes the motion of an object when it is in contact with another surface.

Front

What is gravity?

Back

A noncontact force that pulls objects toward each other, such as the force that pulls us toward the Earth.

Tags

NGSS.HS-PS2-4

Front

What is velocity?

Back

The speed of an object in a specific direction, e.g., 40 m/h north.

Front

What is net force?

Back

The overall force acting on an object when all individual forces are combined.

Tags

NGSS.MS-PS2-2

Front

How do you calculate net force?

Back

Add up all the forces acting on an object, taking into account their direction.

Tags

NGSS.MS-PS2-2

Front

What is an example of a noncontact force?

Back

Magnetic force, which can attract or repel magnets without touching.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Front

What happens when two forces act in opposite directions?

Back

The net force is the difference between the two forces, in the direction of the larger force.

Tags

NGSS.HS-PS2-1

Front

What is the unit of force?

Back

Newton (N).