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ES-ME301

Total questions: 75

Worksheet time: 13mins

Name
Class
Date
1.

In a bicycle, the friction in the wheels acts (with respect to its motion)

a)

in forward directions for both the wheels

b)

in backward direction for both the wheels

c)

in forward direction for the front wheel and in backward direction in rear wheel

d)

in backward direction for the front wheel and in forward direction in rear wheel

2.

According to the law of Solid friction, the frictional force

a)

depends on area of contact

b)

does not depend upon area of contact

c)

sometimes it depends sometimes does not depends on area of contact

3.

The process of finding out the resultant force is known as

a)

Superposition of forces

b)

Addition of forces

c)

Resolution of forces

d)

Composition of forces

4.

The resultant of two forces 'P' and 'Q' which are acting at an angle 'θ' is

a)

(P2-Q2+2PQCosθ)1/2

b)

(P2+Q2-2PQCos θ)1/2

c)

(P2-Q2+2PQSinθ)1/2

d)

(P2+Q2-2PQSinθ)1/2

e)

(P2+Q2+2PQCos θ)1/2

5.

The resultant of two forces P and Q acting along the same straight line and in same direction is

a)

2P+Q

b)

P+2Q

c)

P+Q

d)

P-Q

6.

The resultant of two equal forces P making an angle 2θ is given by

a)

2Psinθ

b)

2Pcosθ

c)

2Ptanθ

d)

2Pcotθ

7.

Following are the angles between two forces when the resultant is maximum and minimum, is

a)

90° and 0°

b)

0° and 90°

c)

180° and 0°

d)

0° and 180°

8.

The resultant for a number of forces acting at a point, is given by

a)

(ΣV)2-(ΣH)2

b)

(ΣV)2+(ΣH)2

c)

[(ΣV)2-(ΣH)2]1/2

d)

[(ΣV)2+(ΣH)2]1/2

9.

The point, at which the whole weight of the body may be considered to act, is known as

a)

Centre of mass

b)

Centre of curvature

c)

Centre of gravity

d)

Moment of Inertia

10.

SI unit of force is

a)

Pound

b)

Newton

c)

Dyne

d)

Joule

11.

If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is (a)   degrees

12.

The forces which does not meet at a point but their lines of action lie in the same plane are known as

a)

Non-coplanar non concurrent forces

b)

Coplanar non-concurrent forces

c)

Non-coplanar concurrent forces

d)

Coplanar concurrent forces

13.

When the car moves on road, then its wheel has

a)

Purely rotational motion

b)

Purely translational motion

c)

Rotational and translational motion

d)

None of the above

14.

The friction experienced by a body when it is rest is called

a)

Rolling friction

b)

Limiting friction

c)

Static friction

d)

Dynamic friction

15.

The friction experienced by a body when it is in motion is called

a)

Rolling friction

b)

Limiting friction

c)

Static friction

d)

Dynamic friction

16.

Two blocks A and B of weight 4KN and 2KN respectively are in equilibrium position as shown in fig, Coefficient of friction for both surfaces are same as 0.25, make calculations for the force P required to move the block A

a)

1.593 N

b)

1.325N

c)

1.874N

d)

2.753N

17.

Coefficient of friction depends upon

a)

Area of contact only

b)

Nature of surface only

c)

Both the area of contact and the nature of surface

d)

Neither the area of contact and the nature of surface

18.

Which of the following is a vector quantity?

a)

Energy

b)

Mass

c)

Momentum

d)

Angle

19.

The product of force of couple with the arm of the couple is called

a)

Resultant couple

b)

Moment of the forces

c)

Resulting couple

d)

Moment of the couple

20.

The moment of a force is

a)

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

b)

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

c)

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

d)

none of these

21.

Frictional force encountered after commencement of motion is called

a)

Limiting friction

b)

Kinematic friction

c)

Dynamic friction

d)

Frictional resistance

22.

Determine the moment of the 50N force about the point A, as shown in figure

a)

11475.19N –mm (Anticlockwise)

b)

11475.19N –mm (Clockwise)

c)

22375.19N –mm (Anticlockwise)

d)

22375.19N –mm (Clockwise)

e)

31275.19N –mm (Anticlockwise)

23.

Friction is

a)

Always harmful

b)

Always beneficial

c)

Sometimes harmful sometimes beneficial

24.

What does the moment of a force measure?

a)

The tendency of rotation of the body along any axis

b)

The moment of inertia of the body along any axis

c)

The couple moment produced by the single force acting on the body

d)

The total work done on the body by the force

25.

If a car is moving forward, what is the direction of the moment caused by the rotation of the tires

a)

It is heading inwards, i.e., the direction is towards inside of the car

b)

It is heading outwards, i.e., the direction is towards outside of the car

c)

It is heading forward, i.e., the direction is towards the forward direction of the motion of the car

d)

It is heading backward, i.e., the direction is towards the back side of the motion of the car

26.

The tendency of rotation of a body along any axis is also called _____________

a)

moment of inertia

b)

moment of couple

c)

torque

d)

force

27.

A force of 50N produces a moment of force of 10Nm in a rigid body. Calculate the perpendicular distance between the point of application of force and the turning point

a)

0.1m

b)

0.2m

c)

0.3m

d)

0.4m

e)

0.5m

28.

The moment axis is in the direction perpendicular to the plane of the force and the distance.

a)

True

b)

False

29.

If you are getting to know about the direction of the moment caused by the force applied on the body by using your wrist and curling it in the direction of the rotation, then which of the following is NOT correct?

a)

The thumb represent the direction of the force

b)

The thumb represents the direction of the moment

c)

The fingers represents the direction of the force

d)

The direction in which you curl your wrist is towards the direction of the distance from point of contact of force to the axis of rotation

30.

The moment axis, force and the perpendicular distance in the moment of the force calculation is lying in __________.

a)

Two planes perpendicular to each other

b)

A single plane in the direction of the force

c)

A single plane in the direction of the perpendicular distance

d)

A single line in the direction of the force

31.

Which of the following is true?

a)

Total moment of various forces acting on the body is the vector sum of all moments

b)

Total moment of various forces acting on the body is the algebraic sum of all moments

c)

Total moment of various forces acting on the body is always zero

d)

Total moment of various forces acting on the body is the vector sum of all moments which is perpendicular to each other forces

32.

The _________ forces do not cause the rotation

a)

Non-concurrent

b)

Concurrent

c)

Parallel

d)

Non-parallel

33.

Moments can be added like scalars, that it can be added algebraically with proper sign

a)

True

b)

False

34.

If you are opening the door, then the force you apply is greater if you open it from the part closer to the hinges.

a)

True

b)

False

35.

If a force applied at any point in its line of action and is still creating the same moment about any fixed point say P, then the force is said to be________

a)

Couple

b)

Sliding vector

c)

Slider couple

d)

Couple slider

36.

How much should be the moment of the force 50 N about point 'S'?

a)

0 Nm

b)

350 Nm

c)

100 Nm

d)

200 Nm

37.

What should be the moment of 50N force about point "R"?

a)

O Nm

b)

350 Nm

c)

100 Nm

d)

200 Nm

38.

Moment is the product of which two vectors?

a)

force and radius vector

b)

radius and force vectors

c)

force and radius scalars

d)

radius and force scalars

39.

How far from the point 'P' on the shaft a vertical force of 200 N can be applied so as to create the same moment, as produced by the force 75 N at point 'P'?

a)

1.2 m

b)

1.125 m

c)

0.6 m

d)

0 m

40.

The unit of power in S.I. system is

a)

Horsepower

b)

Joule

c)

Watt

d)

Kg-m

41.

1 watt is equal to

a)

0.1 Joule/s

b)

1 Joule/s

c)

10 Joules/s

d)

100 Joules/s

42.

What should be the moment of the force 75 N about point 'p' ?

a)

110 Nm

b)

112.5 Nm

c)

60 Nm

d)

0 Nm

43.

Forces are called concurrent, when their line of action meet in

a)

one point

b)

two points

c)

plane

d)

perpendicular planes

e)

different planes

44.

Forces are called coplanar when all of them acting on body lie in

a)

one point

b)

one plane

c)

different planes

d)

perpendicular planes

e)

different points

45.

A force acting on a body may

a)

introduce internal stress

b)

balance the other forces acting on it

c)

retard its motion

d)

change its motion

e)

all of these

46.

which is the most correct statement about law of polygon of forces

a)

if any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium

b)

if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium

c)

if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

d)

none of these

47.

The algebraic sum of the resolved part of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. this is as per principle of

a)

forces

b)

independence of forces

c)

dependence of forces

d)

balance of forces

e)

resolution of forces

48.

If two equal forces of magnitude "P" act at an angle 9 degrees, their resultant will be

a)

P/2 cos( 9/2)

b)

P sin(9/2)

c)

2P tan(9/2)

d)

P cos(9/2)

e)

P sin (9/2)

49.

Dynamic friction as compared to static friction is

a)

same

b)

more

c)

less

d)

may be less of more depending on nature of surface and velocity

e)

not possible to compare

50.

Friction is a –

a)

non-contact force

b)

contact force

c)

magnetic force

d)

electrostatic force

51.

Which of the following produces least friction ?

a)

sliding friction

b)

rolling friction

c)

static friction

d)

composite friction

52.

Friction does not depend on

a)

type of contact surfaces

b)

contact area

c)

condition of contact surface

d)

none of these

e)

all of these

53.

Angle of friction and angle of repose are –

a)

proportional to each other

b)

not equal to each other

c)

equal to each other

d)

quantities which can never be comparable

e)

always negligible

54.

The coefficient of friction is equal to

a)

cos of angle of friction

b)

sin of angle of friction

c)

tan of angle of friction

d)

cot of angle of friction

e)

cosec of angle of friction

55.

The angle between normal reaction and resultant (of friction and normal reaction) force is called

a)

coefficient of friction

b)

force of friction

c)

angle of friction

d)

all of these

e)

none of these

56.

A mass of 4 kg rests on a horizontal plane . The plane is gradually inclined until at an angle thita=15(degree) with the horizontal , the mass just begin to slide. What is the coefficient of static friction between the block and the surface ? (please chose the nearest option)

a)

0.9632

b)

0.2679

c)

0.8144

d)

0.8659

e)

0.1751

57.

A heavy box of mass 20 kg is pulled on a horizontal sueface by applying a horizontal force . If the coefficient of kinetic friction between the box and the horizontal surface is 0.25, find the force of friction exerted by the horizontal surface on the box. (take g=9.8 m/s2)

a)

29 N

b)

39 N

c)

49 N

d)

59 N

e)

69 N

58.

1kg block is resting on a surface with coefficient of friction 0.1 . A force of 0.8 N is applied the block . The friction force is –

a)

1.2 N

b)

0.8 N

c)

0.98 N

d)

1N

e)

9.8N

59.

Limiting force of friction is the _________

a)

ratio of limiting friction and normal reaction

b)

the friction force acting when the body is just about to move

c)

the friction force acting when the body is in motion

d)

minimum force of friction

60.

The ratio of limiting friction and the normal reaction is known as -

a)

angle of contact

b)

coefficient of friction

c)

angle of friction

d)

sliding friction

e)

limiting ratio

61.

Friction force encountered after commencement of motion is called –

a)

post friction

b)

frictional motion

c)

limiting friction

d)

dynamic friction

e)

frictional resistance

62.

According to the principle of transmissibility of forces , the effect of a force upon a rigid body is –

a)

the same at every point in its line of action

b)

different at different points in its line of action

c)

minimum when it acts at the C.G of the body

d)

maximum when it acts at the center of gravity of a body

e)

none of these

63.

Which of the following is a vector quantity –

a)

energy

b)

mass

c)

momentum

d)

angle

e)

temperature

64.

"If the three forces acting on a particle makes the particle in equilibrium, then each force is proportional to the sine of the angle between the other two".... this is in accordance with

a)

Varignon's theorem

b)

Lami's theorem

c)

Hooke`s law

d)

Principle of superposition

e)

principle of transmissibility of forces

65.

Product of magnitude of force and perpendicular distance from line of action of force to the point or axis is called –

a)

resultant of force

b)

moment of force

c)

moment centre

d)

none of these

e)

equivalent force

66.

"The moment of the resultant of two forces in a plane about any point in the plane is the algebric sum of the moments of the individual forces about the point".....this is in accordance with

a)

Varignon's theorem

b)

Lami's theorem

c)

Principle of transmissibility of forces

d)

Parallelogram law of forces

e)

Principle of superposition of forces

67.

What will be the moment about point 'P'?

a)

1067.50 N-m (Anticlockwise)

b)

1067.50 N-m(Clockwise)

c)

667.50 N-m (Clockwise)

d)

667.50 N-m (Anticlockwise)

e)

867.50 N-m (Clockwise)

68.

An weight of 80 N is supported by two cables as shown in the figure. Find the tensions T1 and T2 in two connecting cables.

a)

T1 = 20√3N and T2 = 30N

b)

T1 = 30√3N and T2 = 80N

c)

T1 = 80√3N and T2 = 20N

d)

T1 = 40√3N and T2 = 40N

e)

T1 = 50√3N and T2 = 80√3N

69.

What is the correct formula of theorem of perpendicular axis?

a)

Izz = Ixx – Iyy

b)

Izz = Ixx + Ah2

c)

Izz – Ixx = Iyy

d)

None of the mentioned

70.

What is the unit of radius of gyration?

a)

m4

b)

m

c)

N

d)

m2

e)

N/m2

71.

What will be the the radius of gyration of a circular plate of diameter 10cm?

a)

1.5cm

b)

2.0cm

c)

2.5cm

d)

3.0cm

e)

3.5cm

72.

The unit of moment of inertia of an area is

a)

kg/m

b)

kg/m2

c)

m

d)

m3

e)

m4

73.

What is the formula of radius of gyration?

a)

k = I/A

b)

k = I2/A

c)

k = I2/A2

d)

k = (I/A)1/2

e)

k2 =(I/A)1/2

74.

A rectangle having width 'b' and depth "d". The first moment of area about an axis passing through centroid is

a)

1/12 bd3

b)

1/12db3

c)

1/3bd2

d)

1/6db3

e)

zero

75.

In a statically determinant plane truss, the number of joints(j) and the number of members(m) are related by

a)

j=2m-3

b)

m=2j+1

c)

m>3j-2

d)

m=2j-3

e)

m<2j-3

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