* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download File
Uncertainty principle wikipedia , lookup
N-body problem wikipedia , lookup
Laplace–Runge–Lenz vector wikipedia , lookup
Quantum vacuum thruster wikipedia , lookup
Fictitious force wikipedia , lookup
Theoretical and experimental justification for the Schrödinger equation wikipedia , lookup
Photon polarization wikipedia , lookup
Specific impulse wikipedia , lookup
Accretion disk wikipedia , lookup
Centrifugal force wikipedia , lookup
Seismometer wikipedia , lookup
Center of mass wikipedia , lookup
Angular momentum operator wikipedia , lookup
Angular momentum wikipedia , lookup
Newton's theorem of revolving orbits wikipedia , lookup
Modified Newtonian dynamics wikipedia , lookup
Classical mechanics wikipedia , lookup
Centripetal force wikipedia , lookup
Rigid body dynamics wikipedia , lookup
Work (physics) wikipedia , lookup
Equations of motion wikipedia , lookup
Classical central-force problem wikipedia , lookup
Relativistic angular momentum wikipedia , lookup
Newton’s 1st and Laws nd 2 Newton In the 1660’s Sir Isaac Newton formulated three laws of motion. These laws describe how forces affect motion. All by the age of 18 Newton’s An st 1 Law object at rest stays at rest and an object in motion stays in motion until acted on by an outside force. Nothing will begin moving or stop moving unless something makes it. Inertia and the Inertia is the property of an object that causes it to resist motion. The more mass an object has, the more inertia it has. st 1 Law Newton’s 2nd Law 2nd law is Force = mass times acceleration. F=ma Large force on a small mass gives large acceleration. Small force on a large mass gives small acceleration The A Newton The unit of force is called a Newton (N). 1N will accelerate 1kg at 1m/s2 After any force answer always put N for the units. Practice with the A car has a mass of 1000 kg and is accelerating at 3m/s2. What is the force acting on the car? What force is need to cause a 3kg bowling ball to accelerate 4m/s2? nd 2 Law Newton’s For rd 3 Law every action there is an equal and opposite reaction. Ex. Sitting in your chair. Gravity pulls you down and your chair pushes back with an equal and opposite force. Rockets The action: Fuel is forced out of the back of the rocket. The reaction: The rocket is moved forward. Momentum All moving objects have momentum. Momentum depends on the mass and velocity (speed) of an object. Calculating Momentum Momentum = mass x velocity Momentum(P) = m x v Mass is measured in kg and velocity in m/s. Therefore the units of momentum are kg-m/s. This is said kilogram meters per second. Practice with Momentum A bowling ball has a mass of 3 kg and travels with a velocity of 5 m/s. What is the momentum? A car weighing 1500 kg is traveling with a velocity of 4 m/s. What is the momentum? Conservation of Momentum The total momentum is always conserved unless acted on by an outside force. Momentum is transferred from one object to another. Examples of Conservation A bat hitting a baseball. The momentum is transferred from the bat to the ball. Bowling. The momentum is transferred from the bowling ball to the pins.