# Simple F(x) problem -

1. Mar 3, 2008

### Eagle Eyes

A pipe bending machine applies a force (in newtons) given by F(t) - 19.2t - 3t^2, where t is in seconds. The impulse delivered to a pipe during the interval t =0 to 6.4 sec equals..

The answer is 131 N-s. But why.. can somebody explain it step by step. URGENT help required.

Thanks alot.

2. Mar 4, 2008

### mrandersdk

look here:

http://en.wikipedia.org/wiki/Impulse

you need to calculate the integral

$$\int _0^{6.4} 19.2 t - 3t^2 dt$$

asuming you ment F(t) = 19.2 t - 3t^2 , not F(t) - 19.2 t - 3t^2.