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7th Grade Science
Forces and Motion
8. Forces
8.1 Types of Forces, Contact and non-contact forces
Contact vs. Non-Contact Forces: Understanding How Forces Act
Explore how forces act on objects whether through direct physical contact or invisibly across empty space through gravitational, magnetic, and electrostatic fields.
What You'll Learn
Contact forces require physical touch between two interacting objects.
Non-contact forces act across empty space through invisible fields.
Gravity, magnetism, and electrostatic force are key non-contact forces.
Friction, tension, and normal force are common everyday contact forces.
What You'll Practice
1
Students classify forces as contact or non-contact using real examples.
2
Questions test knowledge of gravity, friction, magnetism, and electrostatics.
3
Learners identify forces acting on objects in everyday physical scenarios.
Why This Matters
Understanding contact and non-contact forces is fundamental to explaining how every physical interaction in the natural and engineered world occurs, from braking systems to planetary orbits.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
Contact Forces
Non-Contact Forces
Gravity
Magnetic Force
Friction
NJ Curriculum Aligned