When two elastic bodies collide with each other,

Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation

A

Is directly proportional to their velocity of approach

B

Is inversely proportional to their velocity of approach

C

Bears a constant ratio to their velocity of approach

D

Is equal to the sum of their velocities of approach

During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.

A

Equal to

B

Equal and opposite to

C

Less than

D

Greater than

Three elastic constants for a completely anisotropic elastic material which follows the Hooke's law are young's modulus, elastic limit stress and yield stress. Which of the following properties is most sensitive to increase in strain rate ?

A

Tensile strength

B

Elastic limit

C

Proportional limit

D

Yield strength

The phenomenon of collision of two elastic bodies takes place because bodies

A

Immediately after collision come momentarily to rest

B

Tend to compress each other till they are compressed maximum possible

C

Attempt to regain its original shape due to their elasticities

D

All the above

A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

A

Steel

B

Glass

C

Rubber

D

Brass

Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)?

A

E = 2G (1 + v)

B

E = G (1 + v)

C

$${\text{E}} = \frac{{{\text{G}}\left( {1 + {\text{v}}} \right)}}{2}$$

D

E = 2G (1 + 2v)

All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain

A

Increases very quickly

B

Decreases very quickly

C

Increases in proportion to stress

D

Decreases in proportion to stress

For perfectly elastic bodies, the value of coefficient of restitution is

A

0

B

0.5

C

1

D

0.25

When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

A

Zeroth law of thermodynamics

B

First law of thermodynamics

C

Second law of thermodynamics

D

Kelvin Planck's law

When they had a meeting seven company executives __ T, U, V, W, X, Y and Z ___ sit at a rectangular table .Three executives sit along one side of the table , and three sit along the other side, each directly opposite one of the other three. The seventh sits at the head of the table . There is no seat at the foot of the table . Ualways sits in one of te two seats farthest from the head of the table. Y and V always sit next to each other .V never sits next to Z . If Z does not sit at the head of the table, W sits there. If W sits directly opposite T, X must sit next to which of the following excutives?

A

T

B

U

C

V

D

Z

When two elastic bodies collide with each other,

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