2.8,2.9 Centre of Gravity, Momentum & Impulse

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13 Terms

1
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Define centre of gravity/mass.

point through which the weight of an object acts

2
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Is this stable?

yes

3
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Is this stable?

no

4
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What is used to measure centre of mass of irregular shapes?

plumb line

5
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When does toppling occur?

centre of gravity falls outside of base

6
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↓Centre of Gravity =

more stabilty

7
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Momentum formula

p = mv

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For p = mv, what is the unit for p?

kgm/s

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Is momentum a vector or scalar quantity?

vector

10
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Define impulse.

when external resultant force acts on an object for a short time & changes the object’s motion

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Impulse formula: Δ__ = __Δ__

p = Ft

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What is the unit for impulse?

Ns

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Impulse is also just

change in momentum