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Physics > Moments > Flashcards

Moments Flashcards

1
Q

define centre of gravity

A

A point on object where all of its weight appears to act on

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2
Q

define moments

A

Product of force and perpendicular distance from pivot to line of action of force

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3
Q

define principal of moments

A

For a body to be in equilibrium sum of clockwise moments about a pivot is equal to sum of anti clockwise moments about the same pivot

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4
Q

why more force needed if distance decreases (still don’t understand)

A

If force X decreases force Y Will increase, since greater force is needed to produce same moment. According to principal of moments, since distance of force Y from pivot decreases force Y increases .

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5
Q

explain why force at a nail is greater than force exerted at handle of hammer

A
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6
Q

explain why block X topples if its ramp is tilted any further

A
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7
Q

explain why block X does not topple

A
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8
Q

explain why block X is most unstable when placed on its side with smaller area

A
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9
Q

state the conditions of equilibrium

A
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10
Q

define stability

A
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11
Q

state 2 ways to improve stability of an object

A
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12
Q

why is a reactangular block most unstable when it is lying on its smallest area

A
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13
Q

formula for moments

A
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14
Q

formula of principal of moments

A
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15
Q

formula for resolving forces vertically

A
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16
Q

conversion formula

A
17
Q

define stable equilibrium

A
18
Q

define unstable equilibrium

A
19
Q

define nuetral equilibrium

A
20
Q

centre of gravity after being slightly displaced in a stable equilibrium

A
21
Q

centre of gravity after being slightly displaced in a unstable equilibrium

A
22
Q

centre of gravity after being slightly displaced in a neutral equilibrium

A
23
Q

moment of its weighted pivot after being slightly displaced in a stable equilibrium

A
24
Q

moment of its weighted pivot after being slightly displaced in a unstable equilibrium

A
25
Q

moment of its weighted pivot after being slightly displaced in a neutral equilibrium

A
26
Q

factors affecting stability

A

Physics (12 decks)

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