Centre of Mass

Question 1

Mass

Answer 1

amount of matter in an object

Question 2

unit of mass

Answer 2

Kilogram/KG

Question 3

weight

Answer 3

a measure of the force of gravity on an object

Question 4

Unit of weight

Answer 4

Newtown, N

Question 5

Centre of mass

Answer 5

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

Question 6

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

Answer 6

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

Question 7

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

Answer 7

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

Question 8

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

Answer 8

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

Question 9

where is the Centre of mass of a symmetrical object>

Answer 9

where the likes of symmetry cross.

Question 10

suspended equilibrium

Answer 10

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.