Additional Physics

All additional physics topics.

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Velocity and Speed Formula

speed = distance

              time

  • speed is how fast you are moving
  • velocity is how fast you are moving in the given direction
  • speed = m/s
  • distance = m
  • time = sec
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Acceleration Formula

acceleration = change in velocity

                               time

  • how quickly the velocity is changing
  • change in velocity = final velocity - starting velocity
  • velocity = m/s
  • acceleration = m/s2
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Distance-Time Graph

(http://www.scienceaid.co.uk/physics/forces/images/speedtime.jpg)

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Distance-Time Graph

  • A-B - steady speed
  • B-C - stopped
  • C-D - steady speed
  • gradient = speed
  • curved lines - acceleration or deceleration, not steady speed
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Velocity-Time Graph

(http://www.bbc.co.uk/scotland/learning/bitesize/standard/physics/images/bus_graph.gif)

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Velocity-Time Graph

  • A-B - steady speed
  • B-C - deceleration
  • C-D - steady speed
  • D-E - acceleration
  • gradient = acceleration
  • area under graph = distance travelled

Gradient

  • y2-y1

         x2-x2 =gradient = aceleration

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Gravity

  • Force of attraction between ALL masses
  • on the surface of a planet - makes things move towards the ground, pull towards the center of earth
  • give EVERYTHING a weight
  • keeps planets, moons and satellites in orbit
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Weight and Mass

Weight

  • measured in newtons (N)
  • weight is caused by gravity
  • weight changes - different on the moon than on earth
  • measured by a newton meter

Mass

  • measured in kilograms (kg)
  • the 'amount of stuff' in an object
  • the same everywhere
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Weight Formula

weight = mass x gravitational field strength

  • mass = kg
  • weight = newtons
  • gravity different on different planets - earth = 10N/kg, moon = 1.6N/kg
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Comments

Emilyxoxo<3

Thanx was helpful :) x

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