ES AMACE

Types of normal stress are tensile and compressive

True

The deformation of a material from stress

Strain

The point through which the whole weight of the body acts is called

Center of Gravity

States that strain produced within elastic limits is proportional to the stress producing it

Hooke's Law

The stress which acts in a direction perpendicular to the area.

Normal Stress

A diagram which shows the variations of the axial load for all sections in the span of a beam

Shear Force Diagram

A condition in which the resultants of all forces acting on the body is zero.

Equilibrium

Statics of rigid bodies is the study of materials, objects, or particles at rest or moving under constant velocity

True

A combination of large number of particles in which all particles remain at a fixed distance from one another before and applying a load

Rigid Body

States that the moment of a force about a point is equal to the sum of the moments of the force's components about the same point

Varignon's Theorem

When equal and opposite forces applied to a body tend to elongate it, the stress produced is ______

Tensile

Stress at which extension of a material takes place more quickly as compared to the increase in load

Yielding Point

SI unit for bending moment.

kN m

Refers to the gravitational force (attraction) of the earth acting on a body

Weight

A beam is said to be uniform strength, if _______.

Bending stress is the same at every section along its longitudinal axis

In a beam, which layer is neither elongated nor shortened during bending?

Neutral Axis

What is the straight line from point o?

Proportional Limit

The contact pressure between the separate bodies

Bearing stress

A _____ isolates a body from its surroundings, and one considers all the forces and only those forces, acting on the body.

Free Body Diagram

In a body loaded under plane stress conditions, how many independent stress components are present?

3

A man raises a 10kg joist, of length 4 m, by pulling on a rope as shown in the picture. How many concurrent forces are acting upon the joist?

3

SI unit for shear force

kN

A ______ body is one which does not deform. The distance between the individual particles making up the body remains unchanged under the action of external forces

Rigid

Ratio of yield strength to allowable stress

Factor of safety

Which of the following is not a type of normal stress?

Thermal stress

In the figure below, if the system is in equilibrium, what is Fbc=?

5250 lbs

Two forces act on a bolt at point A. Determine the magnitude of the resultant force

97.73 N

Find the coordinates of the centroid of the shaded area shown in Fig. 6.20

x = 7.73 ; y = 5.07

A block 100mm x 100mm base and 10mm height. What will be the direct shear stress in the element when a tangential force of 10kN is applied to the upper edge to a displacement 1mm relative to the lower face?

1 MPa

States that strain produced within elastic limits is proportional to the stress producing it.

Hooke's Law

For the figure below, what are the reaction forces at A and B?

+96lb; +64lb

Find the support reaction Av

3.33 kN

In the figure below, find the reaction at point A or Ra

16 kN

If the x- and y- components of the forces on the figure shown are -105 N and -200 N, respectively, what is the magnitude of the resultant force?

-225.90 N

Which of the is a “non-hookean” material?

Rubber

A kind of load that acts over a small distance that it can be assumed to act at a point

Concentrated Load

Force system whose lines of action pass through a common point

Concurrent

It is a structure made of two force members all pin is connected to each other

Truss

Force that inhibits change in the state of movement of a body

Reaction Force

The intensity of loading increases or decreases at a constant rate

Triangular Load

Deals with the relation between externally applied loads and internal effects.

Strength of Materials

A type of beam with at least three or more supports

Continuous Beam

An axis passing through the centroid of an area is known as a __________

Centroidal Axis

The action lines of all the forces are in the same plane and intersect a common point

Concurrent, Coplanar

Cantilevered beam is considered as:

Determinate Beam

Moment of Inertia is used for the stress calculations of________

Moment

The resultant of two forces which is the diagonal formed on the vectors of this force.

Parallelogram Law

Each action has a reaction equal in magnitude and opposite in direction

Newton’s 3rd Law

The measure of tendency of a force to make a rigid body rotate about a fixed axis

Moment

Two forces 3 N and 4N are perpendicular to each other the resultant of the two forces is

5 N

A 5cm-diameter 80cm long steel bar is restrained from moving. If its temperature is increased 100 deg. C, determine the induced compressive stress? For steel = 11.7 x 10.6 per degree C, E = 210 GP

246000kpa

The slope of the stress and strain

Modulus of Elasticity

Strain is deformation divided by _______

Length

This method uses the free body diagram of joints in the structure to determine the forces in each member

method of joints

Some members in the truss which cannot carry load

Zero Force member

Centroid is used to determine if the building is

Stable

A type of beam with either or both ends extending beyond the support

Overhanging Beam

What is the unit of stress?

Pascal

It is the intensity of the force.

Magnitude

Unit of force

Newton

Quantities having both magnitude and direction

Vector

When several forces act in a given situation

System of Forces

A beam that is simply supported at both ends is called

Simple Beam

What kind of curve is the Uniformly Distributed Load in the shear diagram?

Second Degree Curve

Strength of materials refers to the tendency of the structure not to _______

Break

It is a type of beam which is restrained at both ends

Fixed beam

What is the unit of torque?

kN-m

Centroid is also called the axis of ________

Zero Stress

The safe load the material can carry

Proportional Limit

Deformation is a measure of the material’s ______________

Rigidity

The external effect of a force in a rigid body is the same for all point along its line of action

Principle of Transmissibility

Can be calculated if we have a rectangular coordinate system, one can define the area moment of interial around the axis

Area Moment of Inertia

Bolt double shear is an example of what stress

Bearing

When a machine shaft is subjected to torque, the stress is _______

Torsional

If an area has one line of symmetry the centroid will

lie somewhere along the line of symmetry

What will be the minimum diameter of a steel wire, which is used to raise a load of 4000 N if the stress in the rod is not to exceed 95 MN/m^2?

7.32 mm

The quantity of matter in a body is its _____

Mass

The stress in a rod is 70N/mm2 and the modulus of elasticity is 200000 N/mm2. What will be the strain in the rod?

0.00035

The types of normal stresses are shear and bending.

False

What is the unit of compressive stress?

N/mm^2

Shear force is diagram is a/an _______ representation of shear force plotted as ordinate

Graphical

A tensile test was conducted on a steel bar. The load of elastic limit was 250 kN and the diameter of the steel bar was 3cm. What will be the value of stress?

35368 x 10^4N/m^2

The phenomenon of slow growth of a strain under a steady tensile stress is called __________.

Creeping