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Škola: Gymnázium, Brno, Slovanské náměstí 7

Škola: Gymnázium, Brno, Slovanské náměstí 7 Šablona: III/2 – Inovace a zkvalitnění výuky prostřednictvím ICT Název projektu: Inovace výuky na GSN prostřednictvím ICT Číslo projektu: CZ.1.07/1.5.00/34.0940 Autor: RNDr. Bc. Miroslav Hruška

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Škola: Gymnázium, Brno, Slovanské náměstí 7

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  1. Škola: Gymnázium, Brno, Slovanské náměstí 7 Šablona: III/2 – Inovace a zkvalitnění výuky prostřednictvím ICT Název projektu: Inovace výuky na GSN prostřednictvím ICT Číslo projektu: CZ.1.07/1.5.00/34.0940 Autor: RNDr. Bc. Miroslav Hruška Tematická oblast: Dynamics of particles (dynamika hmotných bodů) Název DUMu: Linear momentum Kód: VY_32_INOVACE_FY.3.04 Datum: 27. 9. 2013 Cílová skupina: Žáci středních škol s CLIL výukou fyziky v angličtině Klíčová slova: Linear momentum, change in linear momentum Anotace: Prezentace slouží k zavedení fyzikální veličiny hybnost. Na začátku prezentace se opakují první dva Newtonovy zákony.

  2. Dynamics of particles 4. Linear momentum

  3. Find words • rita neli (adjective) • a blance • fotr nici • fotr nece • a sestre nic • saturn let • via tygr Zdroj: archiv autora

  4. Completesentences A body is at …… or in uniform ……. …… unless made to …… its …… by ……forces The ……of a body is directly …… to the net forceacting on the body, and inversely ……to itsmass 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

  5. 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. http://www.youtube.com/watch?v=AFnoBrhOR4U 2:42

  6. Linear momentum I For a body (a particle) we define linear momentum (hybnost) as the product of its mass and its velocity: 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

  7. 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.

  8. Linear momentum II If body’s velocity changes from toduring a time interval, then linear momentum changes from to Change in the linear momentum is If p1 = p2, does it mean ?

  9. Law of acceleration • There is no acceleration in the formula now… :-) If we use the change in the linear momentum, Newton’s second law of motion can be presented this way:

  10. 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

  11. 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

  12. That is all for now Thank you for your attention

  13. 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 80-7196-176-0 • 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!

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