Pressure Calculation

1. The problem statement, all variables and given/known data

Calculate the pressure of sand grains falling on a 10cm X 10cm sheet of paper. Assume the grains are each 1 mg in mass, the ate pf the sand as it falls is 100 grains per second. The sane is falling from a height of 1m under gravity, and the sheet it falls to is sticky, so that the grains stick after they fall. Calculate the PRESSURE the sand exerts on the sheet of paper each second.

A) 5.0 Pa
B) -5.0 Pa
C) -19.6 Pa
D) 19.6 Pa

2. Relevant equations

P=F/A

3. The attempt at a solution

I tried finding F by doing mg of 100 grains and dividing that by .01 cm^2 but didn’t come up with any of these answers.

http://ift.tt/1rakRNH

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