A question involving work, power, etc.

[baileya]

Homework Statement

A man sits in a cannon and lights the fuse. A force of 6000N propels him out of the barrel (which is 2.5 meters long) in a time of .35 seconds. The man has a mass of 85 kg.

1. How much work is done on the man by the cannon? (ignore man's weight)
2. What is the average power exerted on the man?
3. How high above the cannon does he rise during his flight?

Homework Equations

work= F(xf-xi)costheta
mgyi+1/2mvi^2+work=1/2mvf^2+mgyf

The Attempt at a Solution

I didn't get far at all as the only examples in my notes weren't really like this question.

 

[rock.freak667]

The Attempt at a Solution

I didn't get far at all as the only examples in my notes weren't really like this question.

Well you know that work done = Force*distance

So in the cannon, what is the work done? (Hint: They gave you the force and the distance).

Remember that power is nothing but the work done per unit time (hint: they told you the time for which the force acts).