ENGINEERING MECHANICS QUIZ

The maximum acceleration of a particle moving with simple harmonic motion is

ωr

ω²r

ω/r

ω

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The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.

None of these

Equal to

Greater than

Less than

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From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the centre of circular plate

2.5 cm

0.5 cm

1.5 cm

1.0 cm

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The moment of a force

Is equal to twice the area of the triangle, whose base is the line representing the force and whose vertex is the point, about which the moment is taken

Is the turning effect produced by a force, on the body, on which it acts

Is equal to the product of force acting on the body and the perpendicular distance of a point and the line of action of the force

All of these

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Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

40 N

120 N

None of the listed here

20 N

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The law of motion involved in the recoil of gun is

Newton's third law of motion

None of these

Newton's second law of motion

Newton's first law of motion

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If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

g/4

g/2

g/3

None of these

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The motion of a wheel of a car is

Combined translation and rotational

None of the listed here

Purely translation

Purely rotational

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The Cartesian equation of trajectory is (where u = Velocity of projection, α = Angle of projection, and x, y = Co-ordinates of any point on the trajectory after t seconds.)

y = (gx²/2u² cos²α) - x. tanα

y = x. tanα + (gx²/2u² cos²α)

y = (gx²/2u² cos²α) + x. tanα

y = x. tanα - (gx²/2u² cos²α)

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The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P cotθ/2

2P cosθ/2

2P sinθ/2

2P tanθ/2

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