APPLIED MECHANICS AND GRAPHIC STATICS QUIZ

A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is

1.0

0.50

0.25

0.75

TRUE ANSWER : ?
YOUR ANSWER : ?

Effect of a force on a body depends upon its

Direction

All of these

Position

Magnitude

TRUE ANSWER : ?
YOUR ANSWER : ?

The C.G. of a right circular cone lies on its axis of symmetry at a height of

h/4

h/3

h/5

h/2

TRUE ANSWER : ?
YOUR ANSWER : ?

The torque produced by a force depends on(i) The magnitude of the force(ii) The direction of the force(iii) The point of application of the force relative to origin

Both (i) and (ii)

Only (i)

Both (i) and (iii)

All (i), (ii) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

The ratio of kinetic energy and potential energy of a simple harmonic oscillator, at a displacement equal to half its amplitude is given by

0.084027777777778

0.042361111111111

0.12569444444444

0.043055555555556

TRUE ANSWER : ?
YOUR ANSWER : ?

The moment of inertia of a hollow circular section whose external diameter is 8 cm and internal diameter is 6 cm, about centroidal axis, is

137.5 cm⁴

437.5 cm⁴

237.5 cm⁴

337.5 cm⁴

TRUE ANSWER : ?
YOUR ANSWER : ?

The centre of gravity of a plane lamina will not be at its geometrical centre if it is a

Right angled triangle

Equilateral triangle

Circle

Rectangle

TRUE ANSWER : ?
YOUR ANSWER : ?

A uniform rod 9 m long weighing 40 kg is pivoted at a point 2 m from one end where a weight of 120 kg is suspended. The required force acting at the end in a direction perpendicular to rod to keep it equilibrium, at an inclination 60° with horizontal, is

10 kg

40 kg

60 kg

100 kg

TRUE ANSWER : ?
YOUR ANSWER : ?

If the given forces P₁, P₂, P₃ and P₄ are such that the force polygon does not close, then the system will

Always reduce to a resultant force

Both (A) and (C)

Be in equilibrium

Always reduce to a couple

TRUE ANSWER : ?
YOUR ANSWER : ?

A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The velocity ratio of the lifting machine is

55

60

50

65

TRUE ANSWER : ?
YOUR ANSWER : ?

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