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Explore Newton’s laws of motion and the concept of force in this interactive lesson. Learn how forces affect motion, the difference between balanced and unbalanced forces, and the role of inertia. Practice calculating net force and understand common forces like gravity, air resistance, and friction.
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Motion and Forces Section 2.3 https://encrypted-tbn2.google.com/images?q=tbn:ANd9GcRIqV4S067Cdm5Ih3vNu-F1_CNdGaLLL-ndzId4zaxoY9XYvhrx
State Standard: • PS 5.7:Explain the motion of objects on the basis of Newton’s three Law’s of motion
What is a Force? • Force – push or pull one body exerts on another • The ability to change an object's motion by: • Starting • Stopping • Speeding up • Slowing down • Changing direction • May change an object's shape • Net force – the combining of forces when two or more forces act on an object
Balanced forces – forces that are equal in size and opposite in direction • Forces are acting on the same object • Do not cause the motion of object to change Forces are vector quantities!
Unbalanced forces– forces that are not equal and opposite in direction • Net force causes object to move in direction of force
Inertia and Mass • Inertia – the tendency of an object to resist changes in its motion • The greater the mass of an object the greater its inertia • Newton’s First Law of Motion – an object moves at a constant velocity until a net force acts on it • An object at rest will remain at rest unless a force acts on it
Common Forces • Gravity – the attraction two objects have for one another • Air resistance – resistance an object feels when traveling through air • Friction – resistance to motion caused by two objects in contact with one another.
