1. The force applied on a nail by a hammer is 20 N. The ends of the nail are 1 cm2 and 0.1 cm2. What are the force and pressure at the tip of the nail? 2. A hydraulic lift has a piston area of 0.5 cm^2 and 4 cm^2. The force applied to the small piston is 200 N. What is the weight that can be lifted by the large piston?
3. An object in air weights 50 N and 30 N in water. Take the density of water as 1000 kg/m3.
a) What is the volume of the object?
b) What is the mass of an object?
c)What is the upthrust force acting on an object in water?

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