2019-04-09T11:39:17+03:00[Europe/Moscow] en true Accelerate, Air resistance, Decelerate, Drag, Force, Friction, Gradient, Gravitational field strength, Light gate, Mass, Speed, Streamlining, Terminal speed, Turbulent flow, Vacuum, Weight flashcards
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  • Accelerate
    When something increases or decreases its velocity (or speed).
  • Air resistance
    A force that acts on a moving object as it passes through air, acting in the opposite direction to the direction of travel and thus having the effect of slowing the object down or preventing it from accelerating.
  • Decelerate
    To slow down. Deceleration can also be expressed as ‘negative acceleration’.
  • Drag
    A force that is applied by a liquid or gas on an object that is moving through it (or on the surface of a liquid). It can also be described as air resistance or water resistance.
  • Force
    An action that can stretch or compress an object, or cause it to speed up, slow down or change its direction of motion.
  • Friction
    A force that acts when two substances touch each other.
  • Gradient
    On a graph, the gradient is the steepness of the line.
  • Gravitational field strength
    This is a measurement of the effect of gravity on a given mass on a particular planet.
  • Light gate
    Sensors that can be used in the laboratory to detect the presence or movement of an object.
  • Mass
    The amount of matter in an object, measured in kilograms.
  • Speed
    A measurement of how fast something is going. Speed is calculated by dividing the distance travelled by the time taken to travel that distance.
  • Streamlining
    The process of designing and building an object with a shape that allows it to pass through the air or water with the minimum air or water resistance.
  • Terminal speed
    The maximum speed that an object can reach, usually when falling.
  • Turbulent flow
    An irregular flow of water or air around an object travelling through it, which creates a lot of drag. This wastes energy.
  • Vacuum
    A region with no particles in it, not even air. In a vacuum, there is zero pressure.
  • Weight
    The force of gravity on an object. Weight always acts towards the centre of a planet. Its size depends on the mass and the gravitational field strength.