# Physics Tutorial 6.1 - Centre of Mass. Types of Equilibrium Revision Questions

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Centre of Mass and Linear Momentum Learning Material
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6.1Centre of Mass. Types of Equilibrium

## Centre of Mass. Types of Equilibrium Revision Questions

1) Four objects are hanged on strings as shown in the figure and initially they are not allowed to move.

Which object will move after being released?

1. Object A
2. Object B
3. Object C
4. Object D

2) What are the coordinates of the centre of mass of the object shown in the figure below if xO = 6 units and zO = 21 units? Write the coordinates of centre of mass in the format (xC, yC, zC).

1. (6, 6, 21)
2. (6, 0, 7)
3. (6, 6, 7)
4. (6, 6, 14)

3) Four objects, A, B, C and D are at rest on the same horizontal plane as shown below.

A strong earthquake occurs and the objects start topple over one by one. Which is the order of their toppling occurrence starting from the earliest?

1. D - C - A - B
2. B - C - A - D
3. D - A - C - B
4. C - D - A - B

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5. Continuing learning centre of mass and linear momentum - read our next physics tutorial: Determining the Centre of Mass in Objects and Systems of Objects