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# AP Physics Daily Problem #161

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Name Per AP Physics Daily Problem 161 The physics classroom measures 30 feet by 30 feet by 10 feet Determine the volume of the room in metric units Determine the mass of the air filling the room Assume a temperature of 0C and one atmosphere pressure Would you be justified in neglecting the compressibility of air in this problem Why Name Per AP Physics Daily Problem 162 A diver leaps into a 4 meter deep swimming pool and sinks to the bottom What is the change in pressure experienced by the diver What is the absolute pressure at the surface of the pool and the bottom of the pool Is this change significant compared to the atmospheric pressure present at the surface Would the pressure change be different if the pool were filled with gasoline yeech Name Per AP Physics Daily Problem 163 A force of 100 pounds is applied to a brake pedal which is attached to a master cylinder with a piston of 2 0cm diameter via a 4 1 lever system The master cylinder pressure is conducted to a brake caliper cylinder whose piston is 6cm in diameter Brake Pedal 100 lbs Caliper Cylinder Master Cylinder Brake Pad Determine the force applied to the master cylinder piston in Newtons Determine the pressure in the brake fluid in Pascals Determine the force that the caliper piston exerts on the brake pad in Newtons If the brake pad has a coefficient of friction of 0 4 determine the braking force that can be applied to a brake disk Consider only this one single brake pad Name Per AP Physics Daily Problem 164 A cube of material 10cm on a side is submerged in a tank of water It has a density of 3 0x103 kg m3 What is the weight of the cube before it is submerged What will the buoyant force be on the cube after it submerged What is the weight of the cube after it is submerged Would the weight of the cube be greater or less if the fluid was gasoline instead of water Explain why in terms of Archimedes principle Name Per AP Physics Daily Problem 165 A meter stick of cross section 7 0mm by 25 0mm and mass 37g

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