- #1
blackbyron
- 48
- 0
Homework Statement
A solid disk with a radius of 3.3cm is a rest. The disk has 1.0m of string wound on to its circumference. The string is pulled off the disk by a constant force in a time of 4.9s. How many revolutions dose the disk make while the string is being pulled off?
Homework Equations
1 rev = 2*pi
V =(2*pi*r)/t
The Attempt at a Solution
find velocity.
Do I need to start off using energy converstion?
(1/2)(m)(v^2) = m*g*x
and I'm lost here
Any help will be appreciated.