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Forces and Motion Ch. 12 Intro to Physics.

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Presentation on theme: "Forces and Motion Ch. 12 Intro to Physics."— Presentation transcript:

1 Forces and Motion Ch. 12 Intro to Physics

2 Forces Force? Friction Vector? Newton (N) Net Force Static Sliding
Balanced Forces Unbalanced Forces Friction Static Sliding Less than static

3 Forces Gravity Rolling Fluid Falling objects Projectile Motion
times less than static or sliding Ball bearings Fluid Air Resistance Aerodynamics Gravity Falling objects Forces? Terminal Velocity Projectile Motion

4 Newton’s 1st Law Every object continues in a state of rest, or of motion in a straight line at a constant speed , unless it is compelled to change that state by forces exerted upon it. Inertia Seatbelts Airbags Axe head Tablecloth

5 Newton’s 2nd Law The acceleration produced by a net force on an object is directly proportional to the magnitude of the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object. Mass Inertia Matter Weight Calculate changes Ex Page 367 1 and 3

6 Newton’s 3rd Law Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object. Action and reaction forces Do not cancel

7 Momentum Inertia in motion Mass and velocity Conservation of momentum
P. 376 P. 377 Data Analysis

8 Universal Forces

9 Universal Forces Electromagnetic Nuclear Electric Magnetic Strong Weak
Protons and neutrons Short distance Weak Weaker and shorter

10 Gravity Long distance Orbit Centripetal Force Tides

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