A piece of wood 400N in weight and 50cm X 30cm X 20cm in size lies on 50cm X 20cm face. Calculate the pressure exerted by it.

4kPa

Explanation:

P = force/area

= 400/(0.5×0.2)

= 4000Pa(4kPa)

4000pascal

Explanation:preassure = force/area

F = 400N

A = 50cmx 20cm = 1000 cm sq

so we have to convert the area in metre square

so when convert we get the answer 1/10 = 0.1m square

now as per the equation of preassure we have to divide 0.1/400

and then we get the answer 4000pascal.

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explanation:

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg