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/ 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: 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.

Dynamics of particles 4. Linear momentum

Zdroj: archiv autora3 Find words  rita neli (adjective)  a blance  fotr nici  fotr nece  a sestre nic  saturn let  via tygr

4  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 Complete sentences

5  A car of a mass 1000 kg speeds up with an acceleration of 5 m/s 2. A force of resistance of a magnitude 1000 N acts against the motion. Calculate the magnitude of the pull of the engine.  2:42 Exercise I

6  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 Linear momentum I

7  A car of a mass 1000 kg speeds up from rest with an acceleration of 3 m/s 2. Calculate the magnitude of the linear momentum after ten seconds of the motion. Exercise II

8  If body’s velocity changes from to during a time interval, then linear momentum changes from to  Change in the linear momentum is  If p 1 = p 2, does it mean ? Linear momentum II

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

10  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 Revision

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

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, s. ISBN  Hornby, A. S. Oxford Advanced Learner’s Dictionary of Current English. 5. vyd. Oxford: Oxford University Press, s. ISBN Autor nezaručuje funkčnost webových odkazů!