4.4 Centre of Gravity [Mastery check]

The point through which the whole weight of the body acts is called

• Inertial Point

• Center of gravity

• Centriod

• Central point

Where the center of gravity of a circle lies?

• At its centre

• Anywhere on its radius

• Anywhere on its circumference

• Anywhere on its diameter

A simple method to find centre of gravity of a body is usage of

• stop watch

• plumbline

• pendulum

• gauge

What is one way you might increase the stability of an object?

• Lower the center of gravity

• Raise the center of gravity

• Increase the height of the object

• Shorten the base of the object

If we suspend lamina at different positions, its center of gravity will still lie along the

• Plumb line

• Line of force

• Line of weight

• Gravity line

this cupboard is filled with boxes. will it topple over ?

• it will
• it will not
• it will if the weight remains inside the base

The diagram shows a uniform, flat metal sheet hanging freely from a nail at point A. One of the labelled points is at the centre of mass of the metal sheet.

Which point is at the centre of mass?

• A

• B

• C

• D

The diagrams show four solid cones. The centre of mass of each cone is marked by a point labelled M.

Which cone is the most stable

• A

• B

• C

• D

A heavy truck on wheels has a platform to attach to it. A man stands on the platform. The truck does not fall over.

Which position A, B, C, or D could be the centre of mass of the whole system (truck, platform and man) ?

• A

• B

• C

• D

A plane lamina with centre of mass X touches the ground at point P. Which diagram shows the lamina in equilibrium?

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