Work, energy, power tennis ball problem

[ferrariistheking]

Homework Statement

A force applied to a tennis ball is described by the function

F(x) = 2x + 5, with the force in Newtons and the position in meters.

How much work does the force do on a tennis ball as it moves from -2.5 m to a new position of 2.4 m?

Homework Equations

F(x)= 2x+5
force x distance= work

The Attempt at a Solution

I found the distance from -2.5m to 2.4m which is 4.9m.

Then I plugged -2.5m into x for the function which is 0.

I then plugged in 2.4m into the function which is 9.8.

With 9.8, I multiplied it by 4.9 m getting 48.02 which is incorrect

Can anybody find my error? Thanks!

 

[andrewkirk]

You need to integrate F(x) from x=-2.5 to x=2.4.

 

[ferrariistheking]

You need to integrate F(x) from x=-2.5 to x=2.4.

ohhhh I see. Thanks for the help once again.