* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Linear momentum - Gymnázium Slovanské náměstí
Dynamical system wikipedia , lookup
Derivations of the Lorentz transformations wikipedia , lookup
Hamiltonian mechanics wikipedia , lookup
Quantum state wikipedia , lookup
Hooke's law wikipedia , lookup
Renormalization group wikipedia , lookup
Modified Newtonian dynamics wikipedia , lookup
Atomic theory wikipedia , lookup
Jerk (physics) wikipedia , lookup
Old quantum theory wikipedia , lookup
Relativistic quantum mechanics wikipedia , lookup
Center of mass wikipedia , lookup
Classical mechanics wikipedia , lookup
Uncertainty principle wikipedia , lookup
Tensor operator wikipedia , lookup
Symmetry in quantum mechanics wikipedia , lookup
Laplace–Runge–Lenz vector wikipedia , lookup
Quantum vacuum thruster wikipedia , lookup
Work (physics) wikipedia , lookup
Bra–ket notation wikipedia , lookup
Accretion disk wikipedia , lookup
Centripetal force wikipedia , lookup
Equations of motion wikipedia , lookup
Angular momentum wikipedia , lookup
Photon polarization wikipedia , lookup
Theoretical and experimental justification for the Schrödinger equation wikipedia , lookup
Rigid body dynamics wikipedia , lookup
Relativistic mechanics wikipedia , lookup
Classical central-force problem wikipedia , lookup
Angular momentum operator wikipedia , lookup
Škola: Šablona: Název projektu: Číslo projektu: Autor: Tematická oblast: Název DUMu: Kód: Datum: Cílová skupina: Klíčová slova: Anotace: Gymnázium, Brno, Slovanské náměstí 7 III/2 – Inovace a zkvalitnění výuky prostřednictvím ICT Inovace výuky na GSN prostřednictvím ICT CZ.1.07/1.5.00/34.0940 RNDr. Bc. Miroslav Hruška Dynamics of particles (dynamika hmotných bodů) Linear momentum VY_32_INOVACE_FY.3.04 27. 9. 2013 Žáci středních škol s CLIL výukou fyziky v angličtině Linear momentum, change in linear momentum Prezentace slouží k zavedení fyzikální veličiny hybnost. Na začátku prezentace se opakují první dva Newtonovy zákony. 1 Dynamics of particles 4. Linear momentum Find words rita neli (adjective) a blance fotr nici fotr nece a sestre nic saturn let via tygr Zdroj: archiv autora 3 Complete sentences A body is at …… or in uniform ……. …… unless made to …… its …… by …… forces The …… of a body is directly …… to the net force acting on the body, and inversely …… to its mass If there are more …… acting on an object, and they are ……, i.e. their …… is a zero vector, then it is the same …… as if …… are no forces at all 4 Exercise I A car of a mass 1000 kg speeds up with an acceleration of 5 m/s2. A force of resistance of a magnitude 1000 N acts against the motion. Calculate the magnitude of the pull of the engine. F Fp Fr Fr F Fp F ma http://www.youtube.com/watch?v=AFnoBrhOR4U 2:42 5 Linear momentum I For a body (a particle) we define linear momentum (hybnost) as the product of its mass and its velocity: p mv Linear momentum is a vector quantity. Its direction is equal to the direction of velocity SI unit of momentum, kg.m/s (kilogram metre per second), is a derived unit 6 Exercise II A car of a mass 1000 kg speeds up from rest with an acceleration of 3 m/s2. Calculate the magnitude of the linear momentum after ten seconds of the motion. p p mv v at 7 Linear momentum II If body’s velocity changes from v1 to v 2 during a time interval, then linear momentum changes from p1 mv1 to p2 mv2 Change in the linear momentum is p p2 p1 m(v2 v1 ) mv If p1 = p2, does it mean p 0 ? 8 Law of acceleration If we use the change in the linear momentum, Newton’s second law of motion can be presented this way: p v p F ma m F t t t There is no acceleration in the formula now… :-) 9 Revision How do we define linear momentum? What do you know about the direction of the linear momentum? What is the unit of linear momentum? Is it a base or derived unit? Write down the formula of the law of acceleration with use of the change in the linear momentum. Read it 10 Find pairs with similar meanings assume, turn, catch up, lift, resultant, take effect, deal with, speed up, dependence, aiming, act on, travel, accelerate, study, overtake, function, suppose, cover, net force, revolution, heading, elevator, grow, increase 11 That is all for now Thank you for your attention Materiál je určen pro bezplatné používání pro potřeby výuky a vzdělávání na všech typech škol a školských zařízeních. Jakékoliv další využití podléhá autorskému zákonu. Zdroje: Bednařík, M., Široká, M. Fyzika pro gymnázia, Mechanika. Dotisk 3. vyd. Praha: Prometheus, 2004. 288 s. ISBN 807196-176-0 Hornby, A. S. Oxford Advanced Learner’s Dictionary of Current English. 5. vyd. Oxford: Oxford University Press, 1995. 1428 s. ISBN 0-19-431423-5 Autor nezaručuje funkčnost webových odkazů! 13