Practice problems :
calculate pressure exerted by a screw on a wooden plank if the area of the screw is 0.24 mm^2 and its weight is 4N .

Practice problems : If the pressure exerted on an area 10cm x 10cm is 1000 dyne/cm^2 , find the force acting on the area ( in dyne ).

Solve the following problems : The area of the tip of a screw is 0.5 mm^2 and its weight is 0.5 N . Calculate the pressure ( in pa ) exerted by the screw on a wooden plank .

Solve the following example : Calculate the pressure when the wooden block is kept in the horizontal position with its surface 80 cm xx 50 cm touching the floor. given : The length of the wooden block is 80 cm, the breadth id 50 cm, the thickness is 20 cm and the weight is 500 N.

Practice problems : A force of 3000 N is applied over an area 80cm x 20cm . What is the pressure acting on the area ?

In the determination if Young's modulus ((Y = (4MLg)/(pild^(2)) by using searle's method, a wire of length L=2m and diameter d=0.5mm is used. For a load M=2.5kg , an extension l=0.25mm in the length of the wire is observed. Quantites D and l are measured using a screw gauge and a micrometer, respectively. they have the same pitch of 0.5mm . the number of divisions on their circular scale is 100 . the contrubution to the maximum probable error of the Y measurement

Calculate the density of paraffin oil, if glass capillary of diameter 0.25 mm dipped in paraffin oil of the surface tension 0.0245 N//m rises a height of 4 cm. (angle of contact of paraffin oil with glass is 28^@ and g=9.8m//s^2 )

A metallic rod breaks when strain produced is 0.2% . The Young's modulus of the material of the rod is 7xx10^(9)N//m^(2) . What should be its area of cross-section to support a load of 10^(4)N ?

The difference in temperature between two sides of a glass plate 0.3 mm thick is 25^@C . If the area of one side surface is 10 m^2 , calculate the heat conducted per second through the plate. The thermal conductivity of glass is 0.84 J//s m K.

Practice problems : A metal weights 0.54 kg in air . If its density is 2.7 g/cc , what will be its weight in water ?