# Impulse and Force-Time Graph

1. Nov 24, 2009

### jmm

1. The problem statement, all variables and given/known data

In the figure , what value of Fmax gives an impulse of 7.1 Ns

2. Relevant equations

3. The attempt at a solution
Impulse is the integral of force with respect to time which is the same the area under the force-time graph which is given by the area of the triangle: 0.5*Fmax*8s

7.1 Ns = 4s * Fmax
Fmax = 1.775 N

However that's not the right answer. Where did I go wrong? Thanks!

2. Nov 24, 2009

### cepheid

Staff Emeritus
The time axis is in milliseconds.

3. Nov 24, 2009

### jmm

Haha thanks! I never would've noticed that.

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