Forces and their effects 1

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  • Forces and their effects
    • How are forces represented?
      • By an arrow, ideally from where the force originates.
    • What will happen if the resultant force acting on a stationary object is zero?
      • The object will stay stationary
    • What is a resultant force?
      • A single force which replaces a number of forces all acting at a particular point.  The resultant force has the same effect on the motion as all the forces acting together.
    • What will happen if the resultant force acting on a moving object is zero?
      • The object will move at the same speed and in the same direction
    • What are the units of mass?
      • Kilograms (kg), grams (g) or sometimes tonnes (1000kg)
    • What is the unit for force?
      • Newtons (N)
    • How are force, mass and acceleration linked?
      • Force = mass x accelerationF(N) = m (kg) x (m/s2)
    • What will happen if the resultant force acting on a stationary object is not zero?
      • The object will accelerate in the direction of the resultant force.
    • What will happen if the resultant force acting on a moving object is not zero?
      • The object will accelerate in the direction of the resultant force.
    • What is the unit of acceleration?
      • Metres per second squared (m/s2)

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