APPLIED MECHANICS AND GRAPHIC STATICS QUIZ

The angle of friction is:

The force of friction when the body is in motion

The angle between the normal reaction and the resultant of normal reaction and limiting friction

The ratio of the friction and the normal reaction

The force of friction at which the body is just about to move

TRUE ANSWER : ?
YOUR ANSWER : ?

If a body is lying on a plane whose inclination with the horizontal is less than the angle of friction, theni. a force is required to move the body upwardsii. a force is required to move the body downwardiii. the body will not be in equilibriumThe correct answer is

only (i)

only (ii)

both (i) and (ii)

both (i) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following represents the state of neutral equilibrium?

A smooth cylinder lying on a convex surface

A cube resting on one edge

None of these

A smooth cylinder lying on a curved surface

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YOUR ANSWER : ?

A square hole is punched out of a circular lamina, the diagonal of the square being the radius of the circle. If ‘r’ is the radius of the circle, the C.G. of the remainder from the corner of the square on the circumference will be

[r (π - 0.25)]/(π - 0.5)

[r (π + 0.25)]/(π + 0.5)

[r (π + 0.25)]/(π - 0.5)

[r (π - 0.5)]/(π + 0.25)

TRUE ANSWER : ?
YOUR ANSWER : ?

The frequency of oscillation on moon as compared to that on earth, will be

2.44 times more

3 times less

3 times more

2.44 times less

TRUE ANSWER : ?
YOUR ANSWER : ?

A geo-stationary satellite is one which orbits the earth with a velocity of rotation of

Earth

Sun

Moon

Pole

TRUE ANSWER : ?
YOUR ANSWER : ?

A solid cylinder of mass M and radius R rolls down an inclined plane without slipping. The acceleration of center of mass of rolling cylinder is (where ‘g’ is acceleration due to gravity and 0 is inclination of plane with horizontal.)

(2/3) g sin 0

(1/3) g sinB

g sin 9

(2/3) g cos 9

TRUE ANSWER : ?
YOUR ANSWER : ?

If a set of given forces are such that their free vectors build a closed polygon, then

The resultant force and resultant couple are always zero

The resultant force is zero but resultant couple may not be zero

The resultant force is zero but resultant couple is not zero

The resultant force and resultant couple both may not be zero

TRUE ANSWER : ?
YOUR ANSWER : ?

A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be

1.5 m/see

0.01 m/sec

1.00 m/sec

0.05 m/sec

TRUE ANSWER : ?
YOUR ANSWER : ?

The centre of gravity of the trapezium as shown in below figure from the side is at a distance of

(h/3) × [(b + 2a)/(b + a)]

(h/2) × [(b + 2a)/(b + a)]

(h/2) × [(2b + a)/(b + a)]

(h/3) × [(2b + a)/(b + a)]

TRUE ANSWER : ?
YOUR ANSWER : ?

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