A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

Engineering Mechanics
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

The change in momentum suffered by rubber ball is less than the lead ball

The change in momentum suffered by rubber ball is more than the lead ball

Both the balls undergo an equal change in momentum

None of these

The change in momentum suffered by rubber ball is less than the lead ball

The change in momentum suffered by rubber ball is more than the lead ball

Both the balls undergo an equal change in momentum

None of these

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Engineering Mechanics
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

IP = IG / Ah2

IP = Ah2 / IG

IP = IG + Ah2

IP = IG - Ah2

IP = IG / Ah2

IP = Ah2 / IG

IP = IG + Ah2

IP = IG - Ah2

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Engineering Mechanics
The moment of inertia of a square of side a about its diagonal is

a²/8

a⁴/12

a⁴/16

a³/12

a²/8

a⁴/12

a⁴/16

a³/12

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Engineering Mechanics
The unit of work in S.I. units is

joule

kg-m

Newton

erg

joule

kg-m

Newton

erg

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Engineering Mechanics
The resolved part of the resultant of two forces inclined at an angle 'θ' in a given direction is equal to

The sum of the resolved parts of the forces in the given direction

The difference of the forces multiplied by the cosine of θ

The algebraic sum of the resolved parts of the forces in the given direction

The sum of the forces multiplied by the sine of θ

The sum of the resolved parts of the forces in the given direction

The difference of the forces multiplied by the cosine of θ

The algebraic sum of the resolved parts of the forces in the given direction

The sum of the forces multiplied by the sine of θ

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Engineering Mechanics
The velocity of a body on reaching the ground from a height h, is

√(gh)

2.√(gh)

√(2gh)

2g.√h

√(gh)

2.√(gh)

√(2gh)

2g.√h

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Engineering Mechanics

Engineering Mechanics A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

Engineering Mechanics The moment of inertia of a square of side a about its diagonal is

Engineering Mechanics The unit of work in S.I. units is

Engineering Mechanics The resolved part of the resultant of two forces inclined at an angle 'θ' in a given direction is equal to

Engineering Mechanics The velocity of a body on reaching the ground from a height h, is

Engineering Mechanics
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

Engineering Mechanics
The moment of inertia of a square of side a about its diagonal is

Engineering Mechanics
The unit of work in S.I. units is

Engineering Mechanics
The resolved part of the resultant of two forces inclined at an angle 'θ' in a given direction is equal to

Engineering Mechanics
The velocity of a body on reaching the ground from a height h, is