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Total questions: 94

Worksheet time: 47mins

Name
Class
Date
1.

A robotic gripper is held in equilibrium by three cables meeting at a joint. If one cable snaps, equilibrium is lost primarily because

a)

Weight becomes zero

b)

Concurrent force condition is violated

c)

Forces become collinear

d)

Newton’s second law fails

2.

Collinear forces act

a)

In the same plane

b)

Along the same straight line

c)

Parallel but separate

d)

At the same point

3.

A body that does not undergo deformation under force is called

a)

Particle

b)

Fluid body

c)

Rigid body

d)

Elastic body

4.

The resultant of forces 3 N and 4 N acting at right angles is

a)

7 N

b)

5 N

c)

1 N

d)

4 N

5.

Statistics deals with bodies

a)

In accelerated motion

b)

At rest or uniform motion

c)

In circular motion

6.

Internal stresses arise due to

a)

External loads

b)

Temperature only

c)

Gravity only

d)

Volume

7.

A force of 200 N acts at an angle of 30° to the horizontal. The vertical component of the force is

a)

200 N

b)

100 N

c)

50 N

d)

173.2 N

8.

A force is completely specified by

a)

Area and direction

b)

Magnitude only

c)

Direction only

d)

Magnitude, direction, and point of application

9.

Lami’s theorem is applicable when a body is in

a)

Equilibrium

b)

Acceleration

c)

Rotation

d)

Motion

10.

In an AGV (Automated Guided Vehicle), unequal force distribution on wheels causes deviation from straight motion. This occurs due to

a)

Net force not being zero

b)

Net force being zero

c)

Absence of any forces on the vehicle

11.

Two forces of 60 N and 80 N act along the same straight line in opposite directions. The resultant force is

a)

100 N

b)

140 N

c)

0 N

d)

20 N

12.

Which law gives the relation F=maF=ma ?

a)

First law

b)

Second law

c)

Third law

d)

Law of inertia

13.

The force system whose lines of action meet at a point is called

a)

Concurrent force system

b)

Collinear force system

c)

Distributed force system

d)

Parallel force system

14.

Two forces of 40 N and 60 N act at 60°. Resultant is closest to

a)

80 N

b)

90 N

c)

70 N

d)

100 N

15.

The triangle law of forces applies to

a)

Two concurrent forces

b)

Three concurrent forces in equilibrium

c)

Parallel forces

d)

Distributed forces

16.

The force system whose lines of action meet at a point is called

a)

Parallel force system

b)

Collinear force system

c)

Concurrent force system

d)

Coplanar force system

17.

Internal forces are studied mainly in

a)

Fluid mechanics

b)

Engineering mechanics

c)

Mechanics of solids

d)

Dynamics

18.

Kinematics differs from kinetics because it ignores

a)

Velocity

b)

Motion

c)

Acceleration

d)

Forces

19.

If the resultant force shifts during acceleration, which force system is affected most?

a)

Collinear

b)

Concurrent

c)

Parallel

20.

A coplanar concurrent force system is in equilibrium. If the magnitude of one force is doubled, which condition must be re-established to regain equilibrium?

a)

ΣF≠0\Sigma F \ne 0

b)

ΣF=\Sigma F = maximum

c)

ΣF=0\Sigma F = 0

d)

ΣM≠0\Sigma M \ne 0

21.

Parallelogram law fails when

a)

Forces are coplanar

b)

Forces are concurrent

c)

More than two forces act

d)

Forces are inclined

22.

The SI unit of force is

a)

Dyne

b)

Newton

c)

Joule

d)

Pascal

23.

A closed force triangle indicates

a)

Rotation

b)

Equilibrium

c)

Translation

d)

Acceleration

24.

Weight of a body depends on

a)

Mass only

b)

Gravitational acceleration

25.

The resolution of a force means splitting it into

a)

Resultants

b)

Scalars

c)

Moments

d)

Components

26.

Newton’s first law is also known as

a)

Law of acceleration

b)

Law of action and reaction

c)

Law of inertia

d)

Law of gravitation

27.

If all forces lie in one plane, the system is

a)

Collinear

b)

Concurrent

c)

Parallel

d)

Coplanar

28.

The principle of transmissibility is applicable to

a)

Deformable bodies

b)

Rigid bodies

c)

Fluid bodies

d)

Plastic bodies

29.

The resultant force represents the

a)

Maximum force

b)

Reaction force

c)

Combined effect of forces

d)

Average force

30.

A parallel force system can be

a)

Only coplanar

b)

Only non-coplanar

c)

Coplanar or non-coplanar

d)

Only concurrent

31.

A concurrent force system becomes non-concurrent when

a)

Forces are equal

b)

Lines of action do not intersect

c)

Forces are parallel

d)

Forces lie in one plane

32.

In a cable-supported platform, if one supporting force acts outside the plane of the other two forces, the system becomes

a)

Coplanar

b)

Concurrent

c)

Non-coplanar

d)

Collinear

33.

Parallelogram law is based on

a)

Newton’s third law

b)

Vector addition

c)

Scalar addition

d)

Energy principle

34.

One newton is equal to

a)

kg⋅m/s2kg \cdot m/s^2

b)

kg⋅m/skg \cdot m/s

c)

m/s2m/s^2

d)

kg/s2kg/s^2

35.

A force of 50 N acts at 30° to horizontal. Horizontal component is

a)

25 N

b)

43.3 N

c)

50 N

d)

30 N

36.

Statics concerns bodies that are

a)

At rest or moving with uniform velocity

b)

In accelerated motion

c)

Under variable acceleration

d)

In uniform circular motion

37.

The polygon law of forces is useful when

a)

Three or more forces act

b)

Only parallel forces act

c)

Only collinear forces act

d)

Two forces act

38.

The triangle used in the triangle law must be drawn

a)

Parallel

b)

Randomly

c)

Tail to tail

d)

Head to tail

39.

Polygon law is useful when

a)

Two forces act

b)

Three or more forces act

c)

Only parallel forces act

d)

Only collinear forces act

40.

Two forces of 50 N and 50 N act at a point with an included angle of 60°. The resultant force is

a)

100 N

b)

75 N

c)

50 N

d)

86.6 N

41.

The resultant force represents

a)

Maximum force

b)

Average force

c)

Combined effect of forces

d)

Reaction force

42.

Two forces 10 N and 20 N act at right angles. Resultant is

a)

10 N

b)

20 N

c)

500\sqrt{500} N

d)

30 N

43.

Triangle law of forces applies when

a)

Two forces act

b)

Three concurrent forces are in equilibrium

c)

Parallel forces act

d)

Forces are collinear

44.

Two concurrent forces of 120 N and 160 N act at right angles. The magnitude of the resultant force is

a)

280 N

b)

200 N

c)

20 N

d)

40 N

45.

The main aim of statics is to study

a)

Motion

b)

Acceleration

c)

Equilibrium

d)

Velocity

46.

If angle between two forces is 0°, resultant equals

a)

Difference

b)

Product

c)

Sum

47.

A robot arm fails due to incorrect resultant force calculation. This failure is mainly due to violation of

a)

Newton’s first law

b)

Parallelogram law

c)

Stress–strain relation

d)

Law of inertia

48.

A body moving with constant velocity is considered under

a)

Dynamics

b)

Kinetics

c)

Statics

d)

Kinematics

49.

Rectangular components of a force are taken along

a)

Any axes

b)

Perpendicular axes

c)

Parallel axes

d)

Inclined axes

50.

Two equal forces act at 120°. Resultant is

a)

Zero

b)

Equal to one force

c)

Twice the force

d)

√3 times force

51.

A body assumed to be undeformable under applied forces is called

a)

Rigid body

b)

Particles

52.

The vertical component of a force F acting at an angle θ is

a)

Fcot⁡θF\cot\theta

b)

Fsin⁡θF\sin\theta

c)

Ftan⁡θF\tan\theta

d)

Fcos⁡θF\cos\theta

53.

A rigid body under three forces is in equilibrium. If the force polygon does not close, the body will

a)

Remain at rest

b)

Be in stable equilibrium

c)

Accelerate

d)

Be under static friction

54.

Vertical component of 100 N100\,\text{N} at 60∘60^{\circ} is

a)

50 N50\,\text{N}

b)

86.6 N86.6\,\text{N}

c)

100 N100\,\text{N}

d)

30 N30\,\text{N}

55.

The horizontal component of a force F acting at an angle θ is

a)

Fsin⁡θF\sin\theta

b)

Fcos⁡θF\cos\theta

c)

Ftan⁡θF\tan\theta

d)

Fsec⁡θF\sec\theta

56.

Lami’s theorem can be used to find

a)

Velocity

b)

Stress

c)

Unknown forces in equilibrium

d)

Acceleration

57.

Lami’s theorem applies to how many forces?

a)

Two

b)

Three

c)

Four

d)

Multiple

58.

Which quantity does NOT change when a body is taken to space?

a)

Weight

b)

Mass

c)

Acceleration

d)

Velocity

59.

A mobile robot experiences wheel slippage due to improper force balance. This indicates failure in satisfying

a)

Newton’s third law

b)

Force equilibrium conditions

c)

Principle of transmissibility

d)

Law of inertia

60.

If ΣFx=0\Sigma F_x = 0 and ΣFy=0\Sigma F_y = 0 , the system is

a)

In motion

b)

In acceleration

c)

In equilibrium

61.

Kinematics differs from kinetics because it

a)

Ignores motion

b)

Ignores forces

c)

Ignores acceleration

d)

Ignores mass

62.

If all forces lie in one plane, the system is

a)

Collinear

b)

Concurrent

c)

Coplanar

d)

Parallel

63.

The relation F=maF = ma is given by

a)

Newton’s first law

b)

Newton’s second law

c)

Law of inertia

d)

Newton’s third law

64.

SI unit of force is

a)

Dyne

b)

Joule

c)

Newton

d)

Pascal

65.

Coplanar concurrent forces lie

a)

Along same line

b)

In same plane and meet at a point

c)

In different planes

66.

FPS system unit of mass is

a)

Pound

b)

Slug

c)

Newton

d)

Kilogram

67.

Dynamics is divided into

a)

Statics and kinetics

b)

Kinematics and kinetics

c)

Kinematics and statics

d)

Mechanics of solids and fluids

68.

A particle in mechanics is defined as an object having

a)

Only volume

b)

Finite size and shape

c)

Only area

d)

Mass concentrated at a point

69.

A non-coplanar force system consists of forces that

a)

Lie in one plane

b)

Lie in different planes

c)

Are collinear

d)

Are parallel

70.

The third law of motion states that action and reaction forces are

a)

Equal and same direction

b)

Unequal and opposite

c)

Equal and opposite

71.

A particle is in equilibrium under three concurrent forces of 100 N, 80 N, and T. If the angle between the 100 N and 80 N forces is 90°, the value of T is

a)

20 N

b)

128 N

c)

64 N

d)

180 N

72.

If ΣFx=0\Sigma F_x = 0 and ΣFy=0\Sigma F_y = 0 , the force system is

a)

Rotating

b)

In equilibrium

c)

Accelerating

d)

Unstable

73.

Stress is defined as

a)

External force

b)

Internal resistance per unit area

c)

Total load

d)

Reaction force

74.

The angle used in Lami’s theorem is the angle between

a)

A force and horizontal

b)

A force and vertical

c)

The other two forces

d)

The resultant and force

75.

Lami’s theorem is applicable when the body is in

a)

Motion

b)

Acceleration

c)

Equilibrium

d)

Vibration

76.

A parallel force system can be applied to

a)

Only non-coplanar

b)

Coplanar or non-coplanar

c)

Only coplanar

d)

Only concurrent

77.

Newton’s first law is also known as the law of

a)

Action and reaction

b)

Gravitation

c)

Inertia

d)

Acceleration

78.

A non-coplanar force system means forces

a)

Lie in the same plane

b)

Lie in different planes

c)

Are parallel

d)

Are collinear

79.

A distributed force acts on a particle

a)

At the center of gravity

b)

At a single point

c)

At the centroid only

d)

Along a line or area

80.

Concurrent forces may or may not be

a)

Parallel

b)

Collinear

81.

A particle is defined as an object having

a)

Finite mass and volume

b)

Only volume

c)

Mass concentrated at a point

d)

Only shape

82.

A body acted upon by three concurrent forces in equilibrium must satisfy

a)

Triangle law

b)

Polygon law

c)

Parallelogram law

d)

Newton’s second law

83.

The third law of motion states that action and reaction forces are

a)

Equal and same direction

b)

Equal and opposite

c)

Parallel

d)

Unequal and opposite

84.

In a three-force equilibrium, if one force increases, the system

a)

Remains unchanged

b)

Loses equilibrium

c)

Becomes collinear

d)

Becomes parallel

85.

In SI system, force is derived from

a)

Length and mass

b)

Mass and time

86.

A force is completely specified by

a)

Magnitude only

b)

Direction only

c)

Magnitude, direction, and point of application

d)

Direction and area

87.

The sum of horizontal force components is denoted by

a)

ΣFy

b)

ΣF

c)

ΣM

d)

ΣFx

88.

Parallelogram law is used to find

a)

Stress

b)

Acceleration

c)

Resultant of two forces

d)

Moment

89.

A rigid body assumption is valid when

a)

Deformation is large

b)

Internal forces dominate

c)

Deformation is negligible

d)

Temperature is high

90.

In a crane lifting system, two inclined cables support a load symmetrically. If one cable angle decreases while the load remains constant, the tension in the other cable will

a)

Increase

b)

Decrease

c)

Remain unchanged

d)

Depend only on the load

91.

A rigid body assumption is valid when

a)

Internal forces dominate

b)

Deformation is large

c)

Deformation is negligible

d)

Temperature is high

92.

In a robotic arm joint, forces are applied at different points but along the same line of action. According to mechanics, the effect remains unchanged due to

a)

Lami’s theorem

b)

Polygon law

c)

Principle of transmissibility

d)

Parallelogram law

93.

A load is suspended by three cables such that the angles between them are unequal. Lami’s theorem can still be applied provided the forces are

a)

Parallel

b)

Coplanar and concurrent

c)

Distributed

d)

Collinear

94.

Engineering mechanics primarily deals with

a)

Heat transfer

b)

Fluid flow

c)

Chemical reactions

d)

Force and motion

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