Mechanical Engineering Test Preparations On Engineering Mechanics Part 1

Test Preparation on Mechanical Engineering Test Preparations On Engineering Mechanics Part 1

1.

A body of weight W is required to move up on a rough inclined plane whose angle of inclination with the horizontal is I+-. The effort applied parallel to the plane is given by(where I1/4 = tanI+ = Coefficient of friction between the plane and the body.)

1P = W tanI+-
2P = W tan(I+- + I+)
3P = W (sinI+- + I1/4cosI+-)
4P = W (cosI+- + I1/4sinI+-)

2.

If a number of forces are acting at a point, their resultant will be inclined at an angle I, with the horizontal, such that

1tan I, = a^'H/a^'V
2tan I, = a^'V/a^'H
3tan I, = a^'Vxa^'H
4tan I, = a^'Vxa^'V

3.

The point, through which the whole weight of the body acts, irrespective of its position, is known as

1moment of inertia
2centre of gravity
3centre of percussion
4centre of mass

4.

Which of the following is a scalar quantity?

1Force
2Velocity
3Acceleration
4Speed

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