Physics 1.1-1.8

Physics 1.1-1.8

1. 1.1

   • Key Words
     • A newton - is the measurement of a force (N)
     • Equilibrium - is when all the forces acting on an object are equal
     • The resultant force - is a single force which has the same effect on an object as the set of forces it replaces
     • Contact forces - are forces that act through touching other objects e.g friction
     • Non-contact forces - are forces that are present without touching the object that they are acting on e.g magnetism

2. 1.2

   • Key words
     • Drag - the resistive force of air of water
     • Friction - a force that acts against movement
     • energy - something has energy if it has the ability to make something happen when that energy is transferred
     • Streamlined - reducing friction and drag with shape
     • Fluid - a substance that would flow liquids are a well known example, but gasses are included

3. 1.3

   • Compression - Force squashing or pushing together
   • Tension - a force applied to a material which tries to stretch it
   • Deformation - change of shape

4. 1.4

   • linear relationship - a relationship between two variable, causing the same change for both variable

5. 1.5

   • pressure - force on a certain area
   • Area - length x width = unit squared

6. 1.6

   • Depth - distance below the surface of a liquid
   • Molecules - 2 to 1000s of atoms joined together
   • Atmospheric pressure - the pressure exerted by the weight of air above that point
   • Height - verticle distance from he ground to the top of an object

7. 1.7

   • Pascal (Pa) - Standard unit of pressure; also kilopascal (kPa); 1kPa = 100 Pa

8. 1.8

   • Density - mass of a material per unit volume
   • Buoyancy - upward force on an object in a liquid
   • Upthrust - upward force exerted on an object in water
   • Displaced - when an object is put into water it displaces some of the water

9. BY LOUIE AND ANTON