Exploring Forces: Net Force, Normal Force, Gravity, and Friction

The video tutorial discusses the most common forces encountered in everyday life: net force, gravity, normal force, and friction. It explains how gravity pulls objects towards the Earth's center, how net force determines motion, the role of normal force in counteracting gravity, and how friction resists movement. The tutorial uses examples like a molcajete on a table and a lime being pulled by gravity to illustrate these concepts. It also touches on how friction can be felt in everyday activities like biking or driving.

Which of the following forces is responsible for pulling objects towards the center of the Earth?

• Gravity

• Friction

• Normal Force

• Net Force

Tags

NGSS.MS-PS2-4

What is the net force on an object that is sitting still?

• Zero

• Equal to its weight

• Equal to the normal force

• Equal to the friction force

What force is responsible for keeping us from floating away into space?

• Friction

• Gravity

• Normal Force

• Net Force

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Why don't objects get pulled to the center of the Earth?

• Because of friction

• Because of air resistance

• Because of the normal force

• Because of net force

Tags

NGSS.MS-PS2-4

What is the net force on an object moving at a constant speed?

• Equal to the friction force

• Equal to its weight

• Zero

• Equal to the normal force

What happens to the net force on an object if it starts to move faster or slower?

• It remains zero

• It becomes equal to the friction force

• It becomes equal to the normal force

• It changes

Tags

NGSS.MS-PS2-2

What is the force that acts perpendicular to the surface and prevents objects from falling through?

• Friction

• Net Force

• Gravity

• Normal Force

Which force is always perpendicular to the surface?

• Net Force

• Normal Force

• Friction

• Gravity

Which force opposes the motion of objects when they rub against each other?

• Gravity

• Friction

• Normal Force

• Net Force

What force slows down objects as they move through air?

• Friction

• Net Force

• Normal Force

• Gravity