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Ur answer to Q11 seems correct but how,d u arrive at answer B in question 12.For me it,s as simple as C ..They asked for instantaneous power which can be observed thru the gradient and tht is most steep from t=2 to 3
hmmm y didnt i see tht..
 
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I think it,s B as 100 -20 =80 N downwards on right hand side..So to pull at 50 rev/s in opposite dir which means at 15m/s(circumference times rev) wud give power as Force *velocity i.e 80*15 =1.2kW
doesnt the spring balance tell us the tensionin the spring due to the load and the force applied by the motor or is it telling us the downward force in the string....
 
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doesnt the spring balance tell us the tensionin the spring due to the load and the force applied by the motor or is it telling us the downward force in the string....
it,s telling the downward force ...there cant be upward force /tension due to load and force of motor as if there were force what thing wud prevent the spring from being pulled in tht direction.In case of downward force(weight) on the spring it is counteracted by the load(on the other side)
 
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it,s telling the downward force ...there cant be upward force /tension due to load and force of motor as if there were force what thing wud prevent the spring from being pulled in tht direction.In case of downward force(weight) on the spring it is counteracted by the load(on the other side)
weight of which thing?
 
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Ur answer to Q11 seems correct but how,d u arrive at answer B in question 12.For me it,s as simple as C ..They asked for instantaneous power which can be observed thru the gradient and tht is most steep from t=2 to 3
answer to 11 is c
 
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Found something. Not everyone has the new editions. Here's a preview of those (first 100 pages - more than enough to get you through the midterms).

Scroll down, there's a "Look Inside" tab there, use that.

BIO: http://education.cambridge.org/in/s...ional-as-and-a-level-biology-(fourth-edition)
CHEM: http://education.cambridge.org/in/s...nal-as-and-a-level-chemistry-(second-edition)
PHY: http://education.cambridge.org/in/s...ional-as-and-a-level-physics-(second-edition)

I also got a PDF link of the Computing book if anyone wants. Found one for the old edition of Physics but yet to test. :p
 
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Found something. Not everyone has the new editions. Here's a preview of those (first 100 pages - more than enough to get you through the midterms).

Scroll down, there's a "Look Inside" tab there, use that.

BIO: http://education.cambridge.org/in/s...ional-as-and-a-level-biology-(fourth-edition)
CHEM: http://education.cambridge.org/in/s...nal-as-and-a-level-chemistry-(second-edition)
PHY: http://education.cambridge.org/in/s...ional-as-and-a-level-physics-(second-edition)

I also got a PDF link of the Computing book if anyone wants. Found one for the old edition of Physics but yet to test. :p
Thanks.
 
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So far Phy is somewhat of a pain,and maths S1 combinations and permutations is going over my head completely.P1 seems pretty straightforward now,hope the same goes in time for S1
 
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