APPLIED MECHANICS AND GRAPHIC STATICS QUIZ

A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is

18° 48'

19° 48'

17° 48'

20° 48'

TRUE ANSWER : ?
YOUR ANSWER : ?

Equation of motion of a point in a straight line, is

v = u + ft

S = ut + ½ ft²

2fS = v² - u²

All listed here

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A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is

43833

43864

43839

44052

TRUE ANSWER : ?
YOUR ANSWER : ?

Effect of a force on a body depends upon its

Magnitude

Direction

All of these

Position

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Time of flight of a projectile on a horizontal plane, is

2u cotα/g

2u cosα/g

2u tanα/g

2u sinα/g

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YOUR ANSWER : ?

The practical units of work, is

Joule

Erg

Dyne

Newton

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A shell of mass 100 kg travelling with a velocity of 10 m/sec breaks into two equal pieces during an explosion which provides an extra kinetic energy of 20000 Joules. If the pieces continue to move in the same direction as before, then the speed of the faster one must be

30 m/sec

40 m/sec

50 m/sec

20 m/sec

TRUE ANSWER : ?
YOUR ANSWER : ?

Newton’s Law of Motion is:

All listed here

To every action, there is always an equal and opposite reaction

Everybody continues in its state of rest or of uniform motion in a straight line, unless it is acted upon by some external force

The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts

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The resultant of the forces acting on a body will be zero if the body

Rotates

Moves along a curved path

Does not move at all

Moves with variable velocity in a straight line

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The ratio of the ranges on the inclined plane with motion upward and with motion downward for a given velocity, angle of projection will be

cos (α - β)/cos (α + β)

tan (α - β)/tan (α + β)

sin (α - β)/sin (α + β)

sin (α + β)/sin (α - β)

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YOUR ANSWER : ?