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Applied Mechanics 1-50

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

Theoretical mechanics is a science:

a)

on the general laws of mechanical motion and equilibrium of material bodies;

b)

on the general laws of fluid and gas;

c)

about strength, stability, rigidity;

d)

on the most general laws of motion and interaction of planets, as well as natural phenomena;

e)

in which constraints are studied;

2.

Statics is the branch of theoretical mechanics which focuses:

a)

on the equilibrium of material bodies (particles) under the action of forces (moments of force);

b)

on the study of reaction force of constraints;

c)

on the study of rigid body motion with respect to moving frame;

d)

on the study of constraints;

e)

on the general laws of fluid and gas;

3.

Two forces can be in equilibrium, if they are equal in magnitude, opposite in direction and collinear in action.

a)

Law of equilibrium of two forces;

b)

Triangle law of forces;

c)

Law of superposition;

d)

Theorem of transmissibility of a force;

e)

Law of action and reaction;

4.

The point of application of a force may be transmitted along its line of action without changing the effect of the force on any rigid body to which it may be applied.

a)

Theorem of transmissibility of a force;

b)

Law of action and reaction;

c)

Law of superposition;

d)

Law of equilibrium of two forces;

e)

Triangle law of forces;

5.

Force is defined by:

a)

its magnitude, its direction, its point of application;

b)

its weight;

c)

its direction;

d)

its magnitude;

e)

its resultant;

6.

What is called force?

a)

measure of interaction of bodies;

b)

movement of bodies;

c)

measure of weight;

d)

measure of gravity;

e)

mechanical action;

7.

Parallelogram law of forces states that if two forces acting simultaneously at a point be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by:

a)

diagonal of the parallelogram which passes through their points of intersection;

b)

diagonal of the parallelogram which does not pass through their points of intersection;

c)

shorter side of the other two sides;

d)

longer side of the other two sides;

e)

none of the above;

8.

If two forces acting simultaneously on a particle represented by the two sides of a triangle (in magnitude and direction) taken in order then their resultant is represented by the third side (closing side) taken in an opposite order.

a)

Triangle law of forces;

b)

Law of superposition;

c)

Theorem of transmissibility of a force;

d)

Law of action and reaction;

e)

Law of equilibrium of two forces;

9.

The action of a given system of forces on a rigid body will no way be changed if we add to or subtract from them another system of forces in equilibrium.

a)

Law of superposition;

b)

Triangle law of forces;

c)

Law of action and reaction;

d)

Law of equilibrium of two forces;

e)

Theorem of transmissibility of a force;

10.

The figure shows:

a)

concurrent force system;

b)

parallel force system;

c)

coplanar force system;

d)

reaction force of constraints;

e)

arbitrary force system;

11.

At what force transfer the action of the forces to absolute rigid body changes?:

a)
b)
c)
d)
e)

arbitrary force system;

12.

Which vector represents the resultant force in the polygon of forces?

a)

OD

b)

AB

c)

BC

d)

OA

e)

DC

13.

What polygon forms an equivalent system of forces:

a)
b)
c)
d)
e)

arbitrary force system;

14.

What figure depicts a couple of forces?

a)
b)
c)
d)
e)

Specify the sliding support:

15.

Specify the sliding support:

a)
b)
c)
d)
16.

Specify the rigid pin support:

a)
b)
c)
d)
e)

arbitrary force system;

17.

Specify the bricking up:

a)
b)
c)
d)
e)
18.

What kind of support generates two unknown reactions?

a)
b)
c)
d)
e)
19.

The force that cancels the effect of the force system acting on the body is known as:

a)

equilibrant;

b)

resultant;

c)

neutral force;

d)

balancing force;

e)

couple of forces;

20.

The magnitude of moment of forces is equal to:

a)

force multiplied by arm of forces;

b)

the arm of forces;

c)

the force direction;

d)

couple of forces;

e)

force multiplied by distance;

21.

Why is force a vector quantity?

a)

Because it has a point of application, magnitude and direction;

b)

Because it's very big;

c)

Because, it is algebraically undefinable;

d)

Because, it determines velocity;

e)

Because, it determines acceleration;

22.

A rigid body is:

a)

the one in which the distance between any two arbitrary points is invariant;

b)

a point mass or a material point;

c)

the quantity of matter in a body;

d)

the measure of sequence of events;

e)

the geometric region occupied by bodies;

23.

A particle is:

a)

a point mass or a material point;

b)

the one in which the distance between any two arbitrary points is invariant;

c)

the measure of sequence of events;

d)

the geometric region occupied by bodies;

e)

the quantity of matter in a body;

24.

A space is:

a)

the geometric region occupied by bodies;

b)

the quantity of matter in a body;

c)

the measure of sequence of events;

d)

the one in which the distance between any two arbitrary points is invariant;

e)

a point mass or a material point;

25.

A mass is:

a)

the quantity of matter in a body;

b)

the geometric region occupied by bodies;

c)

a point mass or a material point;

d)

the one in which the distance between any two arbitrary points is invariant;

e)

the measure of sequence of events;

26.

A time is:

a)

the measure of sequence of events;

b)

the one in which the distance between any two arbitrary points is invariant;

c)

a point mass or a material point;

d)

the geometric region occupied by bodies;

e)

the quantity of matter in a body;

27.

There are forces depending on time:

a)

dynamical;

b)

distributed;

c)

concentrated;

d)

volumetric;

e)

equilibrant;

28.

The external forces are:

a)

active forces and reaction forces in constraints;

b)

distributed forces;

c)

concentrated forces;

d)

volumetric forces;

e)

equilibrant forces;

29.

Lines of action of all forces pass through a common point:

a)

concurrent forces;

b)

collinear forces;

c)

coplanar forces;

d)

couple of forces;

e)

concurrent coplanar forces;

30.

What kind of constraint:

a)

ideal cable, bar, wire;

b)

plane;

c)

sliding support;

d)

bricking up;

e)

true plane surface;

31.

What kind of constraint:

a)

flat surface;

b)

plane;

c)

sliding support;

d)

bricking up;

e)

true plane surface;

32.

What kind of constraint:

a)

true plane surface;

b)

plane;

c)

sliding support;

d)

bricking up;

e)

flat surface;

33.

Which vector represents the resultant force in the polygon of forces?

a)

OC

b)

OA

c)

AB

d)

BC

e)

CO

34.

What polygon forms an equivalent system of forces:

a)
b)
c)
d)
e)

80 кН

35.

Find the resultant force:

a)

-40кН

b)

30кН

c)

60кН

d)

40кН

e)

80кН

36.

Find the resultant force:

a)

50кН

b)

80кН

c)

10кН

d)

70кН

e)

-70кН

37.

Find the moment of the force:

a)

Mo ph3

b)

M0 ph1

c)

M0 ph2

d)

M0 ph4

e)

M0 ph5

38.

The arm of force is:

a)

the shortest distance from point to force;

b)

the distance between point and force;

c)

the distance from axis to point;

d)

projection of forces;

e)

perpendicular of forces;

39.

The moment of force is '+' positive, if it is:

a)

counterclockwise;

b)

clockwise;

c)

along the axis х;

d)

along the axis y;

e)

along the axis z;

40.

The moment of force is '-' negative, if it is:

a)

counterclockwise;

b)

по оси x along the axis х;

c)

along the axis y;

d)

along the axis z;

e)

clockwise;

41.

Any set of material points is a:

a)

mechanical system;

b)

plane;

c)

line;

d)

reference frame;

e)

rigid body;

42.

When the deformation of the body is not taken into account:

a)

when calculating the equilibrium;

b)

when calculating the strength;

c)

when calculating the stiffness;

d)

when calculating the resistance;

e)

when determining the motion;

43.

The coefficient of rolling friction:

a)

k

b)

f

c)

g

d)

ξ

e)

β

44.

The coefficient of sliding friction:

a)

f

b)

k

c)

g

d)

ξ

e)

β

45.

The main task of statics:

a)

determine the conditions of equilibrium of forces;

b)

determine the forces;

c)

determine the reaction forces in constraints;

d)

find the resultant force;

e)

determine a rigid body;

46.

The main task of kinematics:

a)

establish the law of mechanical motion;

b)

determine the translational motion;

c)

determine the rotational motion;

d)

determine the plane-parallel motion;

e)

determine the combined motion;

47.

Find the resultant force:

a)

R= 10кН

b)

R=-40кН

c)

R=-30кН

d)

R=50кН

e)

R=30кН

48.

Specify the force in the figure:

a)
b)
c)
d)
e)
49.

The figure shows:

a)

parallel force system;

b)

concurrent force system;

c)

coplanar force system;

d)

reaction force of constraints

e)

arbitrary force system;

50.

Which vector represents the resultant force in the polygon of forces?

a)

OD

b)

AB

c)

BC

d)

OA

e)

DC

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