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Friction grade 5

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  • air resistance acts in ................. to the movement direction
    opposite
  • A force enables us to control the car speed and to change its direction
    friction force
  • by increasing the speed of the car , air resistance .....................
    increases
  • birds and bats have ...................... to decrease air resistance
    wide wings
  • disadvantages of friction force
    done
  • friction force increases between ............... surfaces and .............. between smooth surfaces
    rough - decrease
  • the friction force between air and moving objects
    air resistance
  • G.R a fish has a streamline shape
    done
  • it is the friction force between water and moving objects
    water resistance
  • the friction force between water and moving object through it is called ......................
    water resistance
  • when a body moves through water, it is affected by .................
    water resistance
  • G.R bat stretches its wings on landing
    done
  • friction force is important for ............................
    done
  • Air resistance acts in ...................... to the movement direction
    opposite
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