Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Equivalence principle wikipedia , lookup
Negative mass wikipedia , lookup
Coriolis force wikipedia , lookup
Electromagnetism wikipedia , lookup
Fictitious force wikipedia , lookup
Lorentz force wikipedia , lookup
Artificial gravity wikipedia , lookup
Modified Newtonian dynamics wikipedia , lookup
Centrifugal force wikipedia , lookup
Newton's law of universal gravitation wikipedia , lookup
Weightlessness wikipedia , lookup
Newton’s Laws of Motion I. Newton’s 1st Law of Motion - Inertia Law states that an object at rest will stay at rest, or an object in motion will stay in motion unless a force acts upon it o What does it mean by a force? A push or pull in a specific direction examples: gravity, magnetism, air, friction contact force - force touches object non-contact force - force does not touch object o What is a balanced force? a force that is equal in strength and opposite in direction they cancel each other out so the force = 0 Newtons results in no motion o What is an unbalanced force? a force that is unequal and moves towards the stronger force if the forces (arrows) are going in the same direction add the forces together if the forces are going in different directions subtract the forces o We use a vector (or an arrow) to show the direction and strength of a force the longer the arrow, the stronger the force the shorter the arrow, the weaker the force Other things to know about Inertia o What is a mass? the amount of “stuff” or matter in an object more mass = more inertia less mass = less inertia II. Newton’s 2nd Law of Motion F = ma (force = mass x acceleration) o units for each force - Newton (N) mass - kilograms (kg) or grams (g) acceleration - meters per second squared (m/s2) o Using the F=ma formula Solving for Force F = ma mass times acceleration answer is in Newtons (N) Solving for mass m = F / a force divided by acceleration answer is in kilograms (kg) Solving for acceleration a = F / m force divided by mass answer is in meters per second squared (m/s2) Other things to know about Newton’s 2nd Law o Mass vs. weight mass always stays the same weight changes with gravity weight is the force of gravity on an object more mass = more gravity more distance = less gravity o acceleration acceleration to Earth due to gravity is always 9.8 m/s2 III. Newton’s 3rd Law of Motion Law states that for every action, there is an equal and opposite reaction o examples: walking, kicking your foot back to make the skateboard to move forward, swimming, a bird flapping its wings to make it fly, the space shuttle taking off