1.1 understanding physics.ppt

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1.1 understanding physics.ppt

  1. 1. PHYSICSFORM 4 Chapter 1 Introduction to Physics By: Wan A’isyah Wan Mahdi
  2. 2. What is PHYSICS??Branch of science concerning the study of●natural phenomena, properties of matter andenergy also the connection between them.Physics – Come from the Latin word physica●meaning the science of natural things.19th century – natural philosophy.●Experimental observations and quantitative●measurements.
  3. 3. Natural Phenomena??Lightning and thunder.●Sea waves and tides.●Rain and sunshine.●Earthquake and hurricane.● LightningLightning is electric current
  4. 4. This parabolaThis parabola-shaped lavaflow illustratesGalileoGalileos law of falling bodies aswell as blackbody radiation –you can tell the temperature from thecolor of the blackbody.Cassiopeia ACassiopeia A – asphericallyCassiopeia A – a sphericallysymmetricremnant of the 1680 supernova
  5. 5. The astronaut and Earth are both in free-fallDispersionDispersion oflightDispersion of light by aprism
  6. 6. Everyday Objects?List an everyday objects around you.●1)2)3)How they are related to physics concept?Made based on physics concepts.●By theories and experiments.●Numerical analysis, calculus, computer●simulations ( technology).
  7. 7. Physics is QuantitativeExperimental results in physics are numerical●measurements and theories.Use mathematics to give numerical results to●match these measurements. What is the differences between physics and math?
  8. 8. ●PHYSICS●Ultimately concerned with descriptions of thematerial world, it tests its theories by comparingthe predictions of its theories with dataproduced from the observations andexperimentation.●MATHEMATICS- Concerned with abstract logical patterns, notlimited by those observed in the real world.
  9. 9. Heat Forces andNuclear physics Motion Fields of LightElectronics study in Physics Electricity and Waves electromagnetism
  10. 10. 1.4 Understanding Measurement Choosing an appropriate instrument to ● measure a physical quantity is important toensure that the measurement is accurate and reproducible.
  11. 11. Common Measurement InstrumentMeasurement tape- measure length of● several metres. - accurate up to 0.01 m.Metre rule – measure lengths of a few●centimetres to a metre. - accurate up to 0.1 cm
  12. 12. Vernier callipers – measure lengths of less● than 10 cm. - suitable for measuring internal or externaldiameter of round object - accurate up 0.01 cmMicrometer screw gauge● - measure the very small readings. - accurate up to 0.01 mm.
  13. 13. Consistency and AccuracyConsistency● -ability of the instrument to measure aquantity with little or no deviation among themeasurement.Accuracy● - actual value or the nearer to the actualvalue. - how close the measurement to the actualvalue.

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