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
