# Turning Forces GCSE Physics AQA (higher)

I have tried to include a question from practically every sentence in the chapter 3.1 in the AQA revision guide.

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What is a "moment"?
a turning effect of a force
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moment of a force =
force x perpendicular distance from the pivot to the line of action of the force
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What can this be shortened to?
f x d
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How would we increase the moment?
Either of the above
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What is the center of mass?
The point where the mass is concentrated
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What is the first step towards finding the center of mass?
Suspend the sheet from a pin held in a clamp stand.
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What is the second step towards finding the center of mass?
When it comes to rest, hang a plumbline from the same pin
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What is the third step towards finding the center of mass?
Mark the position of the plumbline against the sheet
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What is the fourth step towards finding the center of mass?
Hang the sheet with the pin at another point and hang a plumbline from the same pin. Mark the position of the plumbline against the sheet
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What is the fifth step towards finding the center of mass?
The center of mass is where the plumblines cross
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Where is the center of mass when a suspended object is in equilibrium?
Directly below the point of suspension
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Where is the center of mass of a symmetrical object?
On the axis of symmetry
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Sum of anti-clockwise moments =
sum of clockwise moments
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How is the stability of an object increased?
By making the base as wide as possible
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Where does the line of action of the weight of an object act through?
the center of mass
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What happens if the line of action lies inside the base of an object?
nothing
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What happens if the line of action lies outside the base of an object?
it falls over
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When is the Physics Unit 3 exam?
30th May
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When an object moves in a circle it is continuously..........
accelerating
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What is this action called?
centripetal force
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What does this force act towards?
In to the center of the circle
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What would cause the force mentioned in Q20 to increase? (NB more answers on next question)
next.
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What is the force that every body in the universe attracts to another body with?
gravity
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the greater the mass of the body the........this force.
bigger
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As the distance between two bodies increases, the force between them...................
decreases
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What is the shape of a planitary orbit?
elipses
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the larger an orbit, the............a planet takes to go around the sun.
longer
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What is a geostationary satellite?
One that stays at the same position directly above the Earth
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What is a Polar Satellite?
One that passes over both poles while the Earth rotates beneath.
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How long does a geostationary satellite take to travel around the earth once?
24 hours
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How long does a polar satellite take to travel around the earth once?
2 or 3 hours
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What is the Earth's natural satellite?
the Moon
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## Other cards in this set

### Card 2

#### Front

moment of a force =

#### Back

force x perpendicular distance from the pivot to the line of action of the force

### Card 3

#### Front

What can this be shortened to?

### Card 4

#### Front

How would we increase the moment?

### Card 5

#### Front

What is the center of mass?

#### Back

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Loool :)
good Quiz.

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Good quiz, thanks :)

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love u

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I thought the quality of this quiz was of a big scale (usually), it had me riled up like a head of a hard drive, I'm so glad I know now that the exam is on the 30th of may and centripetal forces are homosexuals, thank you *************************************************************************************************************************************************************************************xx*****#

• *****
• ***
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WE LOVE YOU BABE! ****

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12089 I think its about time that you get revising instead of creating digital usernames that no one can remember

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12089 is a F***ing beast

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MasonT290801 Needs to get a life instead of being an underage creep!

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IKR I'm like 80 something and I'm still revising

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im 69

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u don't even know ur own age

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I think my arthritis may get the better of my in the exam, an invigilator may need to be sourced from an old people's home

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#revisemathsew

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The graveyard was too much of a usual big scale for me to visit sorry 12089

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Equality for the homosexual Centripetal Forces!

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u should revise maths

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beat my time and come back to me famalam

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NAH M8, I'll get me beans fam!

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ill eat them

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I'll chop you bruv

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You just contradicted yourself you heterosexual circular motion as you said we should revise mathematical mad tings

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a

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wanna fight me m9 ill F***ing come in two's

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Nah Mad Tings crash my PC

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b

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Go and buy a compass that has existed for as long as compasses have existed

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c

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d

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e

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f

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Nah, They're too much of a recycling lorry

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*Bringing out my 1945 Winchester* I will shoot you blad if you do not stop commenting you terminator looking a** piece of head of a hard drive

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i'll Batter John m8, hes tiny m8, i got harry wren fam!

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dgsh

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harry wren smells

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Peace out I'm going to study that north and south poles DO exist

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ok see u tonight goflynn

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