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Syllabus

PLEASE EXPLAIN STRESS-STRAIN CURVE WITH THE HELP OF A GRAPH?

(b) how does it affect the maximum load it can support without exceeding the elastic limit ?

Steel is more elastic than rubber.Explain?

The length of an elastic string is

rnx metrewhen the tension is8N,and Ym when the tension is. What is the length in metres when the tension is10N?18NPlease answer me fast tomorrow is my test

Young's modulus of a substance depends on

(a) its length

(b) its area

(c) acceleration due to gravity.

derive the formula for elastic potential energy for a stretched wire

Two wires made up of the same material are subjected to forces in the ratio of 1:4. Their lengths are in the ratio of 8:1 and diameter in the ratio of 2:1. Find the ratio of their extensions.

state hooke's law

which type of elasticity is involved in the following cases:

rand 2rare joined as shown in figure. If top end is fixed and lower end of cylinder B is twisted by angle ? Then angle of twist for cylinder A is (both cylinder have same length)what is deforming force & restoring force?

A body is moving on a circle of radius 80m with a speed 20m/s which is decreasing at the rate of 5m/s

^{2}at an istant. What is the angle made by its acceleration with its velocity?^{2}find the velocity of a missile( mass 5g) which is hit upon this rubber cord.which is more elastic- rubber or steel.why?

What are the limitations of Hooke's law

The length of a metal is l

_{1 }when the tension in it is T_{1 }and is l_{2 }when the tension is T_{2}. Find the original length of the wire.does the mass of a body changes when it is heated or cooled?

how does youngs modulus change with rise in temperature?

Q1.Two wires of same length & materials but different radii are suspended from a rigid support.both carry the same load.Will the stress,strain & extension in them be same or different.Justify your answer.

Q2.A wire stretches by a certain amount under a load.If the load & radius both are increased to 4 times.Find the strecth caused in the wire.

Why steel has more elasticity than rubber?

What will be the density of lead under a pressure of 2 x 10

^{8}Nm^{-2}?Given ,normal density of lead =11.4gcm^{-3}and bulk modulus of lead =8.0 x 10^{9}Nm^{-2}? Please reply soon !!!!!!!!!!!!What is percentage increase in the length of a wire of diameter 2.5 mm stretched by a force of 100 kg weight? youngs modulus of elasticity of wire is 12.5 * 10 to power 11 dyne / cm square

a) MgL/2AY b) MgL/3AY c) 2MgL/3AY d) MgL/AY

A metal bar 70 cm long and 4 kg in mass supported on two knife edges placed

10 cm from each end. A 6 kg load is suspended at 30 cm from one end. Find the reactions at the knife edges. Assume the bar to be of uniform cross section and

homogeneous.

what is the cause of elasticity.?

Please solve this physics problem: The breaking stress of aluminium is 7.5 x 10

^{8}dyne/cm^{2}. If the density of aluminium is 2.7 g/cm^{3}, find the maximum of length of aluminium wire that can hang vertically without breaking.What will happen to the potential energy of the atoms of a solid (i) compressed? (ii) on streching wire?

A material has Poisson 's ratio 0.50. If a unform rod of it suffers a longitudinal strain of 2x10^-3. Percentage change in volume is

A composite wire of steel and copper of diameters 1 cm and length 2.2. m and 2m respectivly .total extension of the wire when streched by a force is 1.2mm calculate the force given that youngs modulus for copper is 1.1x10

^{11}and steel 2x10^{11}Pa.what is the meaning of lateral strain

If work done in streching a wire by 1mm is 2J , the work necessary for streching another wire of same material, but with double the radius and half the enegy by 1mm in Joule is ?

it is advised not to stand near a running train.why?

Why does a spring balance show wrong measure after a long use?

Find the change in volume, which 1 m

^{3}of water will undergo when taken from the surface of bottom of sea 1 km deep. Given the elasticity of water is 20,000 atm.Q-A copper wire of length 2.2m and a steel wire of length 1.6m, both of diameter 3.0mm, are connected end to end. When stretched by a load, the net elongation is found to be 0.70mm.Obtain the load applied.

1aur chaiyya kya

WHY BRIDGES ARE DECLARED UNSAFE AFTER LONG USE

A wire of a substance is elongated to double its length such that its density remains unchanged. Poisson’s ratio of the substance is

(1) 0.2

(2) 0.1

(3) – 1

(4) 0.5

why does a railway track have a particular shape like I ?

6.

1.youngs modulus of elasticity of a perfectly rigid body is

a.unity b.zero c.infinity d.none of these

2.bulk modulus of a perfectly rigid body is

a.unity b.zero c.infinite d.some finite small non-zero constant value

PLEASE EXPLAIN EXAMPLE 9.2 OF TEXTBOOK....OF CHAPTER MECHANICAL PROPERTIES OF SOLID....REPLY FAST experts!

A force

rnthe length of wire of cross sectionF doubles. Then what is itsaYoung Modulus?Plz answer me soon

Explain why :

1) It is easier to pull a lawn roller ?

2) The maximum height of the mountain on the earth is not more than 10 K.M.?

^{11}N/m^{2}. The increase in its energy on pressing a rod of length 0.1 m and cross-sectional area 1 cm^{2}made of brass with a force of 10 kg along its length, will be ......................A wire suspended vertically from one of its ends is streched by attaching a weight of 200N to the lower end. The weight streches the wire by 1mm. The elastic energy stored in the wire is :

(A) 0.2 J

(B) 10 J

(C) 20J

(D) 0.1J

_{copper}= 1.1x10^{11 }and Y_{steel }= 2x10^{11 }???For a rocket moving in free space, the fraction of mass to be disposed off to attain a speed equal to two times the exhaust speed is given by(e^2=7.4)

FIND a. shearing strain

b. shearing stress

c. shearing force

n=2x10

^{11}dyes/ cm^{2}1.Prove that Young's modulus of a wire is equal to the stress necessary to double its length.2.A sphere contracts in volume by 0.01% when taken to the bottom of the sea 1 km deep.Find the bulk modulus of the material of the sphere .Density of the water is 1000kg per metre cube.3.Calculate the increase in energy of a brass bar of length 0.2m and cross-sectional area 1 cm square when compressed with a force of 49N along its length.Young's modulus of brass is =1.0 * 10^{11}.4. If in a wire of young's modulus Y ,longitudinal strain X is produced ,what wiil be potential energy stored per unit volume?what are the four applications of elasticity with is explaination....?????

can any one answer this as early as possible plzzzz it's so urgent.

Define Hydraulic Stress....!!!

^{11}N M^{-2}, then how much weight be suspended from a steel wire of length 2.0 m and diameter 1.0 mm so that the length of the wire be increased by 1.0 mm?When the load on a wie is increased slowly from 2kg to 4kg , the elongation increases from 0.6 mm to 1.00 mm . How much work is done during the extension of the wire ?

Calculate the increase in energy of a brass bar of length 0.2m and cross-sectional area 1cm

^{2}when compressed with a load of 5 kg-weight along its length. ( Y = 1 x 10^{11}N/m^{2})A wire stretched by a certain amount under a load. If both lenght and diameter of the wire are doubled, the stretch produced by the same load what

Why steel is more elastic than rubber?

a) Diameter of the wire

b) Mass hanging from the wire

c) Length of the wire

d) Material of the wire

^{11}Pa and that for steel is 2.0x 10^{11}Pa