Physics design help urgent

[HarisShahzad]

May June 2010 paper 52 Q2

http://www.xtremepapers.me/CIE/Internat ... _qp_52.pdf

It is suggested that T and l are related by the equation
T = 2π
l
g
where g is the acceleration of free fall.
(a) A graph is plotted of T 2 on the y-axis against l on the x-axis. Express the gradient in
terms of g.
gradient = ................................................. [1]
(b) Values of l and t are given in Fig. 2.2.
l / cm t / s
90.0 18.9 ± 0.1
80.0 17.9 ± 0.1
70.0 16.7 ± 0.1
60.0 15.5 ± 0.1
50.0 14.1 ± 0.1
40.0 12.6 ± 0.1
Fig. 2.2
Calculate and record values of T and T 2 in Fig. 2.2. Include the absolute uncertainties in T 2.

 

[samy]

what do u need help in?? finding uncertainities???

 

[Sweet_angel]

gradient= 4pi square / g
nw the method to find it is..... like u know gradient is y/x so it'll be T^2/l so when u rearrange the given formulae in terms of T^2/l u get ur ans in terms of g....
I HOPE I CLEARED UR QUES.....


Nw ques b.
for finding the value of T simply do t/10 and error would also get divide by 10 so nw for each value its +or-0.01 (as they have given the time taken for 10oscillations) n for uncertainties it'll b
* find the value of T^2 , THATZ UR VALUE
* nw for uncertainty it'll b delta T^2/T^2= deltaT/T + delta T/T (as T^2 is the product of T X T)

to make it more clear i'll solve it for 1st box
ur value of T is 18.9/10=1.89
for T^2 (1.89)^2 = 3.57
nw uncertainty in T^2 = [2X(0.01/1.89)]X3.57 = 0.04


so ur ans is 3.57+or- 0.04 s^2



HOPE I M ABLE TO HELP U OUT........