Mechanical Engineering Answers

A steel ball with a mass of 0.5 kg and a radius of 10 mm is dropped from a height of 3 m and strikes a homogeneous sheet with a thickness of 1200 mm which is located on a rigid bed. Calculate the maximum penetration, maximum contact force and maximum contact radius in the following three cases. (Assume a modulus of elasticity of 200 GPa, a yield stress of 250 MPa, and a Poisson's ratio of 0.3 if required.)

A) Rigid ball and Linear Elastic plate

B) Rigid ball and rigid-Perfectly Plastic plate

C) Rigid ball and Linear Elastic-Perfectly Plastic

find that at what distance body A will attain a velocity of 3 m/s when starts from rest. Assume coefficient of friction as 0.2 for block and surface and pulleys are frictionless and weightless

A metal cube(faces 20 mm+-0.1mm) fully sinks into a glass full of water. The diameter of the glass is 60 mm+-0,2 mm.Calculate the water rise level and its cumulative error.

A metal cube(faces 20 mm+-0.1mm) fully sinks into a glass full of water. The diameter of the glass is 60 mm+-0,2 mm.Calculate the water rise level and its cumulative error.

a metal cube(faces 20 mm=0.1mm) fully sinks into a glass full of water. the diameter of the glass is 60 mm=0,2 mm.calculate the water rise level and its cumulative error.

explain various types of wood joints with neat diagram

As shown in figure,find that at what distance body A will retain a velocity of 3m/s when starts from rest.assume coefficient of friction as 0.2 for block and surface and pulleye are frictionless

As shown in figure, find that at what distance body A will attain a velocity of 3 m/s when starts from rest. Assume coefficient of friction as 0.2 for block and surface and pulleys are frictionless and weightless

Air is heated in a 4cm×4cm sheet metal duct with a uniform surface

heat flux of 590 W/m2. The mean velocity is 3.2 m/s. The sheet

metal has an average roughness 0.05 mm. If the air enters at 20 ºC

and leaves at a mean temperature of 120 ºC, determine the following

(ignore entrance effects):

[a] The required length of the duct.

[b] The maximum surface temperature.

The pressure of a gas in piston-cylinder varies with volume according to PV=C. The initial pressure is 350KPa and initial volume is 0.03 cubic meter, and the final volume is 0.07 cubic meter. Determine the work done in this expansion process. Express your answer in kiloJoules.