(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

My results are coming out funny and I was wondering if I was doing something wrong.

I have to find acceleration due to gravity.

one of my values ....

m2 (decending mass) = 60g

m1(ascending mass)= 50g

distance traveled= 95.3cm or .953m

time traveled average= 19.60s

total mass (m1 + m2)= 110g

2. Relevant equations

am (measured)= 2y/t^2

at(theoretical) = (m2-m1)g/(m1 + m2)

3. The attempt at a solution

well I try to find g from the am (or measured acceleration) by using the am and plugging into the theoretical accleration (at) equation but find g instead of a.

am= 2(.953m)/(19.60s)^2

am= 0.00496m/s^2

then plugging into the at equation..

am(m1+m2)/ (m2-m1)= g

[0.00496m/s^2 (110g)]/ 10g= 0.54m/s^2 ===> this is so not 9.8m/s^2..

Basically that's it..except I also find the theoretical acelleration from using 9.8m/s^2 which would be the ideal and find that but I get...

at= (m2-m1)g/ (m1 + m2)

at= (10g)(9.8m/s^2) / (110)= .891m/s^2 for acceration.

I'm supposed to ignore the friction..

I really don't know why it comes out like this..Am I doing anything incorrectly??

I have to get this right or explain why it went wrong since this is for a lab report.

Thank You .

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Atwood Machine Lab calculations

**Physics Forums | Science Articles, Homework Help, Discussion**