ENGINEERING MECHANICS QUIZ

A block of mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will ___________ with the increase in coefficient of friction.

Not be effected

Decrease

Increase

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The rate of doing work is known as

Potential energy

Kinetic energy

None of these

Power

TRUE ANSWER : ?
YOUR ANSWER : ?

If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.

None of these

Does not change

Change

Changes periodically

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YOUR ANSWER : ?

The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by

ω/r

ω.r

ω².r

ω²/r

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YOUR ANSWER : ?

The centre of gravity of a right circular solid cone is at a distance of _________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)

h/2

h/4

h/6

h/3

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YOUR ANSWER : ?

A particle moves along a straight line such that distance (x) traversed in 't' seconds is given by x = t² (t - 4), the acceleration of the particle will be given by the equation

6f - 8

3t² + 2t

6f - 4

6t² - 8t

TRUE ANSWER : ?
YOUR ANSWER : ?

The acceleration of a particle moving with simple harmonic motion, at any instant is given by

ω3.y

ω2/y

ω.y

ω2.y

TRUE ANSWER : ?
YOUR ANSWER : ?

The motion of a particle round a fixed axis is

Circular

Translatory as well as rotary

Rotary

Translatory

TRUE ANSWER : ?
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The velocity ratio for the third system of pulleys is

2n - 1

n

n²

2n

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YOUR ANSWER : ?

The coefficient of friction depends upon

Nature of surfaces

Shape of the surfaces

All of these

Area of contact

TRUE ANSWER : ?
YOUR ANSWER : ?

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