Computing Theoretical and Experimental Acceleration

[kukumaluboy]

Homework Statement

How do i compute theoretical acceleration and experimental acceleration?

The Attempt at a Solution

For the first sets of data, the experimental equation, i first averaged the timings.
Then i used:
s = ut + 0.5at^2, where u=0
0.7 = 0.5*a(2.11seconds)^2
a = 0.3144 m/s^2

but for theoretical acceleration, this is what i did.

m1 * g - T = m1 * a (eq 1)

T = m2 * a (eq 2)

Sub 2 into 1:
m1g - m2a = m1 * a
m1g = m1a + m2a
m1 g = a(m1+m2)
a = m1g/(m1+m2)
a = (0.307*9.81) / (0.307+0.011) = 9.47m/s

Where did i go wrong?

 

[BvU]

Which of the two masses 'feels' g ?

 

[kukumaluboy]

OMG!. YOU da mvp! Thanks!