Calculating Force in a Human Cannonball Act: How Is It Done?

[asianygoodnes]

Homework Statement

During a circus performance a 72 kg human cannonball is shot out of an 18m long cannon. If the human cannonball spends .95 s in the cannon, determine the average net force exerted on him in the barrel in the cannon.

Homework Equations

f=ma
x=v0t + 1/2 at^2 (?)

The Attempt at a Solution

So i solved for acceleration using the kinematics equation, assuming that v0=0
i got approximately 40 m/s^2 and multiplied that by the mass of the man
I got about 2900 N. Is this a good answer? Or did I confuse myself, as usual, when it comes to physics.

 

[ehild]

Your solution is correct.

ehild