STRENGTH OF MATERIALS QUIZ

Center of percussion is

the point of C.G.

point of suspension

the point of metacentre

the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

TRUE ANSWER : ?
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Which of the following do not have identical dimensions?

Torque and work

Momentum and impulse

Torque and energy

Moment of a force and angular momentum

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According to principle of moments

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 the algebraic sum of their moments about any point in their plane is zero

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

positive and negative couples can be balanced

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A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to

250

25

50

100

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The unit of force in S.I. units is

newton

kilogram

watt

dyne

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The unit of power in S.I. units is

kilogram meter/sec.

watt

newton meter

joule

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Forces are called coplanar when all of them acting on body lie in

one plane

perpendicular planes

one point

different planes

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A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly

62.5 m

38 m

124 m

96 m

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The coefficient of friction depends on

area of contact

strength of surfaces

nature of surface

shape of surfaces

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Tangent of angle of friction is equal to

kinetic friction

coefficient of friction

angle of repose

limiting friction

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