Topic 4 Lesson 1 Describing Motion and Force

Front

What is a force?

Back

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

Tags

NGSS.MS-PS2-2

Front

What are contact forces?

Back

Contact forces are forces that occur when two objects are physically touching each other, such as friction, tension, and normal force.

Front

What are non-contact forces?

Back

Non-contact forces are forces that act at a distance without physical contact, such as gravitational force and magnetic force.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, caused by the contact between two surfaces.

Front

What is gravity?

Back

Gravity is a non-contact force that pulls objects toward each other, such as the force that pulls objects toward the Earth.

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

Front

How do we represent forces in diagrams?

Back

Forces are represented by arrows in diagrams; the length of the arrow indicates the strength of the force, and the direction of the arrow indicates the direction of the force.

Front

What is net force?

Back

Net force is the total force acting on an object when all the individual forces are combined, taking into account their directions.

Tags

NGSS.MS-PS2-2

Front

What happens when forces are balanced?

Back

When forces are balanced, the net force is zero, and the object remains at rest or continues to move at a constant speed.

Tags

NGSS.HS-PS2-1

Front

What happens when forces are unbalanced?

Back

When forces are unbalanced, the net force is not zero, causing the object to accelerate in the direction of the greater force.

Tags

NGSS.MS-PS2-2

Front

What is the role of mass in force and motion?

Back

Mass is a measure of the amount of matter in an object; it affects how much force is needed to change the object's motion.

Tags

NGSS.MS-PS2-2