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Centre of Mass

Centre of gra...

Question

Centre of gravity always coincides with centre of mass of the body.

A

True

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B

False

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Q. Assertion :Centre of mass of a rigid body always lies inside the body. Reason: Centre of mass and centre of gravity coincide if gravity is uniform.

The centre of gravity of an object always lies within the body of the object.

Q. Which of the following statements are correct?
a) Centre of mass of a body always coincides with the centre of gravity of the body.
b) Centre of mass of a body is the point at which the total gravitational torque on the body is zero.
c) A couple on a body produce both translational and rotation motion in a body.
d) Mechanical advantage greater than one means that small effort can be used to lift a large load.

Q. Which of the following statements are correct?

1.

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

2.

Centre of gravity of a body is the point where total gravitational torque on the body is zero.

3.

A couple on a body produces both translational and rotational motion in a body.

4.

Mechanical advantage greater than one means that a small effort can be used to lift a large load.

Do the centre of mass and centre of gravity coincide?

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