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please help in :
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_12.pdf
Q27
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_12.pdf
Q27
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Saad ro matphysics p1 main i need some help :'|
paper oct 12 var:12 question:14,16,20 :'(
thank you broSaad ro mat
14)
FIRST OF ALL,BOTH NEWTON METERS ARE SHOWING TENSION IN THE STRINGS AND WE HAVE TO FIND THE VERTICAL COMPONENTS OF BOTH THE FORCES.
VERTICAL COMPONENT OF 4 NEWTONS FORCE IS: COS(37) = X/4 , SO X = 4COS(37) = 3.19N
VERTICAL COMPONENT OF 3 NEWTONS FORCE IS: COS(53) = X/3 , SO X = 3COS(53) = 1.80N
NOW WE NEED TO FIND THE RESULTANT FORCE: FORWARD FORCE(WEIGHT) - BACKWARD FORCE
12-(3.19+1.80) = 7N
NOW USE F=MA TO FIND ACCELERATION
7=1.2 x A
A = 7/1.2
A = 5.83 ms^-2 = 6 ms^-2
16)
there are three forces acting on an object as it is lowered in an liquid. gravitational pull(downwards) upthrust(upwards) and viscous drag(upwards)
upthrust is the difference between the (pressure acting on the top of object)- (pressure acing on the bottom)
Viscous drag is the force that a solid experiences as it is lowered down the object due to its viscosity or density( we rather like to say viscosity when referred to a liquid).
since the object is stationary so no viscous drag. gravitional pull equals upthrust.
20)
Use 0.5 * m * v^2 here : 0.5 * (1200 * 1000) * 75^2 = D
thank you soooo sooo much again! can u also do question 35 from http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_11.pdf (s13 variant 1)
thanks a lotSorry for the delay.
View attachment 44799
Got a quick question. How many significant figures should a percentage uncertainty have? (in paper 3, practical)
If I have an absolute uncertainty of 0.1 cm and the reading is 2.5 cm, how many significant figures should the percentage uncertainty have?
Got a quick question. How many significant figures should a percentage uncertainty have? (in paper 3, practical)
If I have an absolute uncertainty of 0.1 cm and the reading is 2.5 cm, how many significant figures should the percentage uncertainty have?
Got a quick question. How many significant figures should a percentage uncertainty have? (in paper 3, practical)
If I have an absolute uncertainty of 0.1 cm and the reading is 2.5 cm, how many significant figures should the percentage uncertainty have?
I have a question regarding paper 3. When drawing a graph based on the readings on our table, if one of our points is far off from the others, after circling it, should we repeat for the reading by crossing out our previous results on the table and just write the new results above the previous one? Or add a new row? Or do we not repeat at all?
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