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physics doubt

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sweetie:
in may06 p1 of phy. cie, why did we split the area inta a trapezium and a triangle instead of just considering the area of the whole triangle????

cud sum1 also xplain Q9. of the same year??????

nid404:
Q9) ohk a spring is oscillating up and down... to begin the oscillation you first stretch the string to the lowest point, once released from there it rises to the mean position(at which it has max velocity) A...from A it moves up to the extreme top which is B(velocity is 0). following that, it moves from B back to mean position(now labelled C) and then to the bottom most point which is D(where v is 0 again)
Got the motion?
So, lowest point is D

What no is the trapezium q?

sweetie:
its Q22

nid404:
Q22) it can be called a triangle only upto 10 mm. Line's not straight after that.

sweetie:
but its written in the Que's to treat the whole line as straight!!!

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