You do a certain amount of work on an object initially at rest, and all the work goes into increasing the object�fs speed. If you do work W, suppose the object�fs final speed is v. What will be the object�fs final speed if you do twice as much work?

Question

1. 4 v
2. 2 v
3. Still v
4.v/�ã2
5. v*�ã2

Answer 1

Work done is proportional to V^2.

If work doubles, the V must increase by a factor sqrt2