Question

4. A screw cannot be easily pulled out from a wall.why?​

Answer 1

Answer:

because of friction

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Answer 2

hey.. here is ur answer..

a screw can't be pulled out easily bcoz of the pressure at the nib of the or screw.. nd friction is also the one of the factor... nd it also depends on the material.. here the material means the wall.. nd the wall is enough strong to resist the screw to be in it...

hope it helps u..