- #1
brycenrg
- 95
- 2
Homework Statement
You swing a ball around a piece of string(vertically). M = 0.150kg r= 1.10m
Calculate the Tention at the bottom of the arc assuming velocity is twice as fast.
Homework Equations
When I do the problem I'm not sure how to set up the NetForce = ma
How do which force is negative and which is positive? I set tension at the bottom to - making the equation to be
mg - Ft = m(v^2/r)
but i don't get right answer
The Attempt at a Solution
mg - Ft = m(v^2/r)
ft = -4 N
but the answer is 7.35 N