Question

Jenny's book has an area of 200cm².
It exerts a pressure of 0.05 newtons.
What is the weight?

Answer 1

Pressure = Force/Area

$0.05 = \frac{force}{200 \times {10}^{ - 4} } \\ force = 200 \times 0.05 \times {10}^{ - 4} \\ \: \: \: \: \: \: \: \: \: \: \: \: = 10 \times 10 {}^{ - 4} = 10 {}^{ - 3}$

Therefore it's weight is 0.001N

it's mass is 0.0001kg

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