- #1
minimario
- 95
- 2
Homework Statement
Homework Equations
$F=ma$
The Attempt at a Solution
(a) Because the spring scale weighs 250 N, the effective weight on the child's side is 230 N. Therefore, $T-230 = \frac{230}{9.8} a$ and $T-250 = -\frac{250}{9.8} a$, so $a = 0.408$.
This is correct, but is the solution really legitimate? The "effective weight" argument seems a bit suspicious and nonrigorous.
(b) I have no idea where to even start. How would the "effective weights" work here? (Or would it even work?)
Thanks,
minimario