ENGINEERING MECHANICS SHORT ANSWER QUESTIONS FOR 2013 STUDENTS

ENGINEERING MECHANICS 

SHORT ANSWER QUESTIONS FOR 2013 STUDENTS

Unit 1

State parallelograms law of forces  and triangle law of forces

State lames theorem

Define moment of a force and couple

State the equations of equilibrium

Define free body diagram for a system of forces

Unit 2

Define: friction, limiting friction, coefficient of friction, angle of repose

State laws of friction

Define static friction and dynamic friction

State the application of wedges, screw jack and differential screw jack

Define belt drives and what are the types of flat belt drives ?

Derive the relation for length of the belt, ratio of tension in the belts, centrifugal tension

Derive the relation for maximum power transmitted by the belt

Unit 3

Define centroid and derive the relation to determine centroid of any plane figure

What is the centroid for, rectangle, triangle, square, circle, semicircle, quarter circle, paraboliod

State Pappus theorem

Define centre of gravity

What is he centre of gravity for cylinder, disk, rod, cone, sphere, hemisphere

State the perpendicular and parallel axis theorem for moment of inertia.

Define polar moment of inertia, radius of gyration

What is the polar moment of inertia for circle, semicircle, rectangle

State the transfer formula for mass moment of inertia

Unit 4

Define trajectory, projectile, range, angle of projection, time of flight

State the types of rigid body motions

What are the equations of plane motion  for linear motion, vertical motion

What are the equations of motion for angular motion

Write note on rolling bodies.

Unit 5

Define work, energy and power

State law of conservation of energy

Define impulse and momentum

Define coefficient of restitution

Define free vibrations and what are the types of free vibrations

Derive the time period for simple pendulum

Derive the time period for compound pendulum

Define torsional vibrations

What is the characteristic equation for torsional vibrations