Centre of Mass Flashcards

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1
Q

Mass

A

amount of matter in an object

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2
Q

unit of mass

A

Kilogram/KG

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3
Q

weight

A

a measure of the force of gravity on an object

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4
Q

Unit of weight

A

Newtown, N

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5
Q

Centre of mass

A

the point in an object where it’s mass can be thought of as concentrated

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6
Q

Step 1 to find centre of mass of an irregular 2D object

A

Put a hole through the object from a pin / rod so that it is freely suspended (swings freely)

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7
Q

Step 2 to find the Centre of mass of an irregular 2D object

A

Hang a plumb line (weighted string) from the pin / rod in front of the object and draw a vertical line along he line of the plumb line on the object

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8
Q

Step 3 to find centre of mass of an irregular 2D object

A

Repeat steps 1 and 2 using a hole near the edge of the object on a different side. Where the two lines cross is the Centre of Mass

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9
Q

where is the Centre of mass of a symmetrical object>

A

where the likes of symmetry cross.

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10
Q

suspended equilibrium

A

The position a hanging object will come to rest in.
This is when it’s Centre of Mass is directly below the point from which it is suspended.

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