# The force applied against an object moving horizontally on a linear path is described by #F(x)= x^2 + x N #. By how much does the object's kinetic energy change as the object moves from # x in [ 2, 5 ]#?

##### 1 Answer

Jul 14, 2016

#### Explanation:

The change in KE is work done against varible frictional force.

So