Question

If the area of head is 15cm×15cm, how much is pressure when the force is 35N ?

Answer 1

fomulas to be used here ( and very imp. to remember )

P (pressure) = F(force) / A (Area on which force acts)

As there in the question,

F = 35 N or 35 kg m s^-2

since, force is in m (SI unit) we also need A in m^2.

A = 15 cm x 15 cm = 15/100 m x 15/100 m = 225 x 10^-4 m^2 [ as 1 cm = 1/100 m]

So, we get P = 35 / 225 x 10^-4 = 1555.56 Pa (approx.)

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