STRENGTH OF MATERIALS QUIZ

(b)2j-l

(d)3/-2

j-2

2/-3

positive and negative couples can be balanced

the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point

if a system of coplanar forces is in equilibrium, then their algebraic sum is zero

if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero

All of the listed here

reaction at a point or an axis, fixed in space, around which a body is con-strained to turn

reaction of any smooth surface with which the body is in contact

reaction of a rough surface of a body which rolls on it without slipping

2 and 5

V5 and V5

2 and V6

3 and 1 kg

the center of heavy portion

the mid point of its axis

the bottom surface

All of these

force of attraction experienced by par-ticles

centripetal force of earth

gravitational force of attraction towards the centre of the earth.

gravitational pull exerted by the earth

plane

perpendicular planes

two points

one point

kg m/sec

kcal/kg sec.

hp (horse power)

kW (kilowatt)

mechanical advantage is unity

mechanical advantage is greater than velocity ratio

mechanical advantage is equal to velocity ratio

mechanical advantage is less than velocity ratio

same

less

may be less of more depending on nature of surfaces and velocity

more