Motion

    Cards (12)

    • The distance-time garph for any object that is:
      • Stationary, is a horizontal line
      • Moving at a constant speed, is a straight line taht slopes upwards.
    • The gradient of a distance-time graph for an object represents the object's speed.
    • Velocity is speed in a given direction.
    • Deceleration is the change of velocity per seconf when an object slows down.
    • A motion sensor linked to a computer can be used to measure velocity changes.
    • The gradient of the line on a velocity-time graph represents acceleration.
    • If a velocity-time graph is a horizontal line, the acceleration is zero.
    • A positive gradient on a velocity-time graph represents positive acceleration, a negative gradient represents deceleration.
    • The area under the line on a velocity-time graph represents distance travelled.
    • The speed of an object moving at constant speed is given by the gradient of the line on its velocity-time graph.
    • The acceleration of an object is given by the gradient of the line on its velocity-time graph.
    • The speed, at any instant of time, of an object moving at changing speed is given by the gradient of the tangent to the line on its distance-time graph.