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Biology; Chemistry; Physics: Post your doubts here!

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I couldn't solve this, how did you get the answer?

Pretty simple .. using the principle of moment ..

wwd7


15*(30+30)=900 To find the moment

to find weight ..
as moment equals 900 Divide the answer (900)/30 to get weight.

then DIVIDE weight by 10 to get the answer. <-- This is what i forgot to do.
 
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Pretty simple .. using the principle of moment ..

wwd7


15*(30+30)=900 To find the moment

to find weight ..
as moment equals 900 Divide the answer (900)/30 to get weight.

then DIVIDE weight by 10 to get the answer. <-- This is what i forgot to do.
Moment/30 to get weight!
Which formula is this?
 
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Does anyone happen to have Examiner tips for physics.... plz give them or the link to them as i cud not find them on either xtremepapers or cie.org....! hurryy....
thanks in advance ;)
 
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wwzn


Q2 a (ii) Height Difference = ?

Please show all the working and formulae as i don't know how to do it :(
 
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wwzn


Q2 a (ii) Height Difference = ?

Please show all the working and formulae as i don't know how to do it :(
I got stuck in the same question but Fallen316 helped me in it!
Since the energy is never lost Kinetic energy is converted to potential energy.(Told be Rimsa and Fallen316)
According to which the formula say Ep=massxGxHeight!
-You have energy 5.5x10^4
-you have mass 85kg
-and you have G= 10
There you have it Height is for the taking!
 
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