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Physics - 1 (in Hindi)
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This lesson includes topics of general physics like newton's laws of motion, types of forces, sound and thermodynamics.

Dr Malik Kazim
I am teacher by passion wants to bring change in the educational scenario of India by bringing competent professionals in system.

Unacademy user
  1. General Science

  2. General Physics . SI System . Surface Tension .Newton's Laws of Motion Simple Harmonic Motion(SHM) Work, Power, Energy, Gravitation . Types of Forces . Archimedes's Principle . Velocity, Elasticity

  3. Seven Fundamental Units of SI Systenm Length - meter Mass - Kilogram Unit Name Unit Symbol Quantity measured meter en . Time - Second logram mass Electric Current - Ampere *e602 Temperature - Kelvin Luminous Intensity - Candela time electric current temperature amount of a substance uminous intensit ampere elvin ole Amount of Substance- candela

  4. Newton's Laws of Motion add to notes Newton's First Law: Objects in motion tend to stay in motion and objects at rest tend to stay at rest unless acted upon by an unbalanced force. Newton's Second Law: Force equals mass times acceleration (F = ma). Newton's Third Law: For every action there is an equal and opposite reaction.

  5. Simple Harmonic Motion (SHM) . Definition: The motion that occurs when an object is accelerated towards a mid- point. The size of the acceleration is dependent upon the distance of the object from the mid-point. Very common type of motiorn eg. sea waves, pendulums, springs

  6. Types of Forces Contact forces: interactionsNon-contact forces: attract or between objects that touch repel, even from a distance magnetic force applied force spring force electric force drag force frictional force gravitational force normal force

  7. Sound Waves - Motion Sound Waves . Beats Organ Pipes Doppler's Effect in Sound Ultrasonic Waves Reflection of Sound Waves . Sonic booms

  8. Types of Waves Wave motion . Compression wave --- oscillations are in the direction of motion Particle-.High Low motiongh density density (a) P-wave Wave motion .Transverse Wave oscillations are transverse to the direction of motion Particle motion (b) S-wave

  9. The Doppler effect is the change in pitch of a sound when the source and observer are moving with respect to each other. When an observer moves toward a source, the wave speed appears to be higher, and the frequency appears to be higher as well. Stationary source Wave speed Observer speed lL

  10. Comparing sound waves and light waves Feature Sound waves Light waves transfer energy yes yes can travel through solids, liquids and gases vacuum, gases, some solid but need a medium and liquids, no medium needed speed 330 m/s in air 1500 m/s in wate 5 000 m/s in steel 3 x 10 m/s in air 2.2 x 108 m/s in water 2 x 108 m/s in glass type of wave longitudinal typical frequency 1 kHz typical wavelength 10 cm or 1 m transverse 5 x 10 Hz 5000 nm = 5 x 10.7 m part of the electromagnetic spectrum no yes