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Lecture 11: Laws of motion
Newton’s 1 st Law: Inertia Matter resists motion If at rest, it will stay at rest If in motion, it will stay in motion Mass is a measure of inertia
Newton’s 2 nd Law An unbalanced force acts on objects equal to its mass and acceleration F = m X a F = force m = mass a = acceleration
Gravity All objects in the universe attract each other Gravity is a function of mass and distance More mass= more gravity More distance = less gravity
Weight and gravity The pull of gravity on Earth is 9.8m/s 2 Weight is mass X the pull of gravity (w=mg) Q: are weight and mass the same? Q: do we weigh the same on the moon as on earth?
Terminal velocity The maximum speed objects fall to earth is 200 mi/h or 320km/h How does the parachute slow the fall?
Newton’s 3 rd Law Forces act in pairs For every action force, there is an equal and opposite reaction force
Momentum = mass X velocity The greater the mass, the greater the momentum. Ex: semi trucks take longer to stop than cars. Q: will momentum be greater at more velocity?
Action and reaction force pairs
Describing Motion Newton’s Laws.
Newton’s 1st Law of Motion
Chapter 13 Forces.
Forces & Motion Unit Vocabulary
Newton’s Laws of Motion
Physical Science 1011 Chapter 2 Newton’s Laws of Motion.
Motion Notes Speed Momentum Acceleration and Force Friction and Air Resistance Newton’s Laws of Motion.
$200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $ 300 $400 $500 $100 $200 $300 $400 $500 $100 What is a Force? Newton’s.
KEY CONCEPTS WHAT DETERMINES THE STRENGTH OF THE FORCE OF GRAVITY BETWEEN TWO OBJECTS? WHAT TWO FACTORS COMBINE TO KEEP THE MOON AND EARTH IN ORBIT? Gravity.
JEOPARDY Force and motion. Force Motion 2 Motion 2 Newton’s Laws Newton’s Laws of Motion of Motion Newton’s Laws Newton’s Laws of Motion 2 of Motion 2.
Chapter 12 Forces.
Newton’s Laws of Motion 1 st - Inertia. 2 nd - F = ma 3 rd - Action/Reaction Take notes when see.
The Nature of Forces Chapter 11 Force A force is a push or pull A force gives energy to an object sometimes causing it to start moving, stop moving,
Motion: a change in position, measured by distance and time.
Chapters 5-6 Test Review Forces & Motion Forces “a push or a pull” A force can start an object in motion or change the motion of an object. A force.
Motion and Forces Review
Motion & Forces.
Motion & Forces Force A push or a pull *Cause an object to start moving, stop moving, or change direction.
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