點解 atwood machine 的 net force 越大 就可以得到better result ?
- 天同Lv 71 decade agoFavorite Answer
就可以得到better result ???
What result? Is it the acceleration due to gravity g? Atwood Machine can be used to determine other physical quantities.
Assume you want to find the value of g from the Atwood Machine experiement, using the equation d = (1/2).g.t^2 (where d is the distance traversed by the each mass in time t), then
g = 2.d/t^2
Clearly, a larger net force gives a larger acceleration of the two masses, and hence a larger value for d and t. This would minimize any measuring uncertainty in the experiement.