physics
posted by Anonymous .
You do a certain amount of work on an object initially at rest, and all the work goes into increasing the objectfs speed. If you do work W, suppose the objectfs final speed is v. What will be the objectfs final speed if you do twice as much work?
1. 4 v
2. 2 v
3. Still v
4.v/ã2
5. v*ã2

Work done is proportional to V^2.
If work doubles, the V must increase by a factor sqrt2