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Kinematics

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... Uniform circular motion The most important formulas Average speed Uniform motion Uniformly accelerated motion ... types of motion Formulas of kinematics ... – PowerPoint PPT presentation

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Title: Kinematics


1
  • Škola Gymnázium, Brno, Slovanské námestí 7
  • Šablona III/2 Inovace a zkvalitnení výuky
    prostrednictvím ICT
  • Název projektu Inovace výuky na GSN
    prostrednictvím ICT
  • Císlo projektu CZ.1.07/1.5.00/34.0940
  • Autor RNDr. Bc. Miroslav Hruška
  • Tematická oblast Kinematics of a particle
    (kinematika hmotného bodu)
  • Název DUMu Centripetal acceleration summary of
    kinematics
  • Kód VY_32_INOVACE_FY.2.19
  • Datum 17. 8. 2013
  • Cílová skupina Žáci stredních škol s CLIL
    výukou fyziky v anglictine
  • Klícová slova Circular motion, circle, centre,
    radius, velocity, vector, subtraction,
    centripetal acceleration
  • Anotace Prezentace slouží k zavedení
    dostredivého zrychlení pri pohybu kružnici.
    Prezentaci je vhodné použít pri probírání nového
    uciva.V druhé cásti zacíná shrnutí uciva
    kinematiky.

2
Kinematics of a particle
  • 19. Centripetal acceleration summary of
    kinematics

3
Change of velocity
  • At uniform circular motion velocity is changing
    (speed is constant)
  • Change of velocity
  • Subtraction of vectors
  • points towards the centre of the circular
    path

4
Acceleration
  • Direction of acceleration is equal to the
    direction of
  • Magnitude

5
Centripetal acceleration
  • Acceleration at uniform circular motion is called
    centripetal acceleration (dostredivé zrychlení)
  • Symbol of centripetal acceleration is
    (English)or (Czech)

6
Exercise I
  • A body is moving round a circle of a radius of 10
    m with a constant speed of 10 m/s. Find its
    centripetal acceleration.
  • r 10 m
  • v 10 m/s
  • ad ?
  • ad v2 r 102 10 10 m/s2
  • The centripetal acceleration is 10 m/s2.

7
Exercise II
  • Imagine you are standing at the equator. Find
    your centripetal acceleration relative to the
    Earths axis.
  • r 6 378 000 m
  • T 23 h 56 min 86 160 s
  • ad ? (v ?)
  • v 2pr T 465 m/s
  • ad v2 r 4652 6 378 000 0.034 m/s2

8
Summary types of motion
9
Formulas of kinematics
  • Average speed acceleration
  • Uniform motion
  • Uniformly accelerated (decelerated) rectilinear
    motion(free fall a g)
  • Uniform circular motion

10
The most important formulas
  • Average speed
  • Uniform motion
  • Uniformly accelerated motion from rest
  • Free fall
  • Uniform circular motion

11
Other important terms I
  • Relativity of motion and rest, frame of
    reference, coordinate system, axes
  • Particle, trajectory, distance, speed, velocity,
    scalar, vector, magnitude, value, direction,
    tangent, acceleration
  • Quantity, unit, SI, base units, derived units,
    multiples and submultiples
  • Quantity as a function of time, graph

12
Other important terms II
  • Addition of motions, addition of vectors, oposite
    vectors, zero vector
  • Acceleration due to gravity, vacuum, latitude,
    altitude
  • Periodic motion, period, frequency, angle,
    radian, angular speed, centripetal acceleration

13
That is all for now
  • Thank you for your attention

14
  • Materiál je urcen pro bezplatné používání pro
    potreby výuky a vzdelávání na všech typech škol a
    školských zarízeních. Jakékoliv další využití
    podléhá autorskému zákonu.
  • Zdroje
  • Bednarík, 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 Learners
    Dictionary of Current English. 5. vyd. Oxford
    Oxford University Press, 1995. 1428 s. ISBN
    0-19-431423-5
  • Autor nezarucuje funkcnost webových odkazu!
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