Which of the following is-are true about the centre of gravity-It is the point through which the weight nbsp-of the body can be assumed to act-A body can have multiple centres of gravity-The centre of gravity of an object need not always coincide with its geometric centre-A body can be balanced at a single point if it coincides with the centre of gravity-

The correct options are A It is the point through which the weight nbsp;of the body can be assumed to act. C The centre of gravity of an object need not alwa ...

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Byju's Answer

Standard IX

Physics

Centre of Gravity of Regular Objects

Which of the ...

Question

Which of the following is/are true about the centre of gravity?

It is the point through which the weight of the body can be assumed to act.

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A body can have multiple centres of gravity.

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The centre of gravity of an object need not always coincide with its geometric centre.

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A body can be balanced at a single point if it coincides with the centre of gravity.

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Solution

The correct options are
A
It is the point through which the weight of the body can be assumed to act.

C
The centre of gravity of an object need not always coincide with its geometric centre.

D
A body can be balanced at a single point if it coincides with the centre of gravity.

The centre of gravity is the point through which the weight of the body can be assumed to act. For regular objects, the centre of gravity lies at their geometrical centre. A body can only have one centre of gravity. A body can be balanced at a single point if it coincides with the centre of gravity.

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Q. (a) Centre of gravity (CG) of a body is the point at which the weight of the body acts
(b) centre of mass coincides with the centre of gravity if the earth is assumed to have infinitely large radius
(c) To evaluate the gravitational field intensity due to any body at an external point, the entire mass of the body can be considered to be concentrated at its CG
(d) The radius of gyration of any body rotating about an axis is the length of the perpendicular dropped from the CG of the body to the axis
Which one of the following pairs of statements is correct?

(a)

Centre of gravity

(C . G .)

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(b)

Centre of mass coincides with the centre of gravity if the earth is assumed to have infinitely large radius.

(c)

To evaluate the gravitational field intensity due to any body at an external point, the entire mass of the body can be considered to be concentrated at its

(C . G .)

(d)

The radius of gyration of any body rotating about an axis is the length of the perpendicular distance from the

(C . G .)

of the body to the axis.

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1.

Centre of mass of a body always coincides wiith the centre of gravity of the body.

2.

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3.

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