## Simple F(x) problem - Urgent!

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.

 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.