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Who is moving?

Who is moving?. Who is moving?. Concept of motion.

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Who is moving?

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  1. Who is moving? ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  2. Who is moving? ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  3. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  4. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  5. Concept of motion • Everything around us is moving in one way or the other. In fact stones, trees, roadways which seem to be stationary also move with the earth's rotation. Motion is a natural event that involves a change in the position or location of an object with time.  Wowww.. I am revolving ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  6. WELCOME Physics Class Unit :Types of Motion ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  7. Why we have to study about Motion? Only for marks? If no, then what are the uses of study of motion? ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  8. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  9. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  10. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  11. Study of motion of objects is a very important aspect of physics. Chemical reactions are possible only because of movement and collision. Geologists use physics of waves to study and measure the tectonic-plate motion and predict earthquake. Cosmologists use this physics to study the behavior of heavenly bodies and doctors use it to map the flow of blood to check whether the arteries are blocked. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  12. Why we have to study about Motion? ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  13. Imperceptible Motions • Constituents of solids are in a state of continuous vibration, not visible to the naked eye. • The revolution and spin of the earth is imperceptible inspiteof their high speed. • Theory of plate tectonics tells us that the continents are drifting at the slow speed. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  14. Concept of motion • Take some water in a trough and float a piece of cork in it. By dipping your finger, disturb the water and observe the floating body. Why did the cork move up and down, but not forward" ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  15. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  16. Facts About Wave Motion • A wave is produced by the periodic disturbance at a point in a medium. • When a wave propagates in a medium the particles of the medium vibrate about their mean position and the energy is transferred without the transfer of the particles of the medium. • Velocity of the disturbance transmitted in a medium is called wave velocity. • The velocity of the wave depends on the nature of the medium not the energy content. • If the periodic disturbance in a medium (wave) moves through a distance ' λ ', and if there are 'n' such cycles per second, the wave velocity’ v’ So, wave velocity, wavelength and the frequency are related by the equation; v = n λ . ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  17. Wave length Crust Through ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  18. Facts of waves Wavelength :The linear distance covered by on complete wave is called wavelength. It is denoted by the symbol Greek letter lambda ‘A’ Displacement :The distance of the particle fro its mean or equilibrium position is called displacement Amplitude :The maximum displacement of a vibrating particle about its mean position is called amplitude. Oscillation :One complete to and fro motion of the particle its mean position is called Oscillation. time period :Time taken by the body to complete one oscillation is called time period. Frequency : The number of oscillations completed by the particle in one second is called frequency. S.I. unit of frequency is Hz(Hertz) ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  19. Mechanical waves ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  20. Types of waves ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  21. Longitudinal Wave ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  22. Transverse Wave ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  23. Difference b/w Types of waves ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  24. Electromagnetic waves and Mechanical waves • The waves associated with electric and magnetic fields, resulting from the acceleration of an electric charge are called Electromagnetic waves. • These waves include visible and ultraviolet light, radio waves, X-rays etc. These waves require no material medium for their propagation. • In the electromagnetic waves, the wave velocity is represented by "c" c-velocity of light in vacuum. C=3x108 ms-1 •  Very large distances which could not be measured was called asceleris. The first letter of this word "c" is used as the symbol for the speed of light in vacuum. • The waves which need a material medium for their propagation are called Mechanical waves. We come across these waves very often. Examples of these waves include water waves and seismic waves. • They can travel only in a material medium such as water, air and earth. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  25. Electromagnetic wave Magnetic field (M) Electric field (E) Direction of Propagation Wavelength ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com EM Wave

  26. Oscillatory motion • Take the bob of the simple pendulum and allow it to move freely. The bob after reaching the equilibrium position moves further. After reaching its extreme position it moves back to the equilibrium position. • This to and fro motion repeats. One to and fro motion is called one cycle. This type of motion is called oscillation. Equilibrium Position ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  27. Oscillatory motion Point of suspension ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  28. Characteristic Properties Of Simple Harmonic Motion • The characteristic properties like, amplitude, oscillation and time period also holds good for simple harmonic motion. • The maximum displacement of the particle on either side of the equilibrium position is called Amplitude. • One complete to and fro motion of the particle about its mean position is called Oscillation. • Time taken by the body to complete one oscillation is called Time period(T). ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  29. Simple Harmonic Motion ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  30. Examples of simple harmonic motion • Oscillation of simple pendulum. 2. When a tuning fork is hit against rubber pad, its prongs execute simple harmonic motion. 3. When the load attached to the lower end of a spring suspended from a support is pulled and released, it executes simple harmonic motion. 4. When the bus is in the clutch gear, we can see a vibration and hear the sound produced by it. This is simple harmonic motion ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  31. Applications of simple harmonic motion ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  32. But be careful !! ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  33. Points to be remembered : ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  34. ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  35. TEST YOUR SELF ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  36. TEST YOUR SELF ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  37. TEST YOUR SELF ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  38. TEST YOUR SELF-HM 2 mark questions: • Mention the applications of the simple harmonic motion • Mention the characteristic properties of simple harmonic motion. • what are mechanical waves ? give examples • what are electromagnetic waves? Give examples • A 50 Hz vibrator produces air waves that speed out at 340 m/s, what is a) their time period ? b) their wave length? • The wavelength of a longitudinal wave is 1 cm, and its velocity in air is 330 m / s. Find out the frequency of this wave. • The frequency of a sound wave is 256 Hz and its wavelength is 1.2 m. calculate its wave velocity . ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

  39. Match the following : • 1-g • 2-f • 3-d • 4-e • 5-c • 6-b • 7-a

  40. All the Best Thank You Prasanna.K.H ಪ್ರಸನ್ನ ಕೆ 8553117978/9482228051 189pkh.wordpress.com

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