Many car calculations, including torque and peak power

[SoftwareEng]

I need to calculate a number of things:
1. the torque of the wheels.
2. The peak power, i am assuming it means of the wheels
3. the work done.

i know:
total mass (car+wheel): 680kg.
mass of wheel: 22.67kg
there are 4 wheels.
radius of each wheel = .203m
time: 8s.
acceleration: 26.82m/s^2
angular acc: 16.5 rad/s^2 (i calculated this, but am fairly certain it is correct)

assumptions

4 wheel drive, so equal output from each wheel
no air resistance.
no rolling friction
even weight distribution on the four wheels.
what i don't understand/ need help with:

1.I attempted to calculate the torque useing the moment of innertia and the angular acceleration, but i am uncertain if i need to use only the weight of the wheel, or of that plus the weight that would be on the wheel.

2. I don't know exactly what peak power is, as it is never explained in the book. I assume its the maximum amount of power, so it would be when the speed is the greatest. if this is not the case, equations would be great.

That is about all. If i am pointed in the right direction on those areas, i should be able to find work done.

EDIT:
I'm not looking for answers, just what i should be doing.

 

[Delphi51]

Welcome to PF, SoftwareEng.
I would find the torque from the force on the wheel and its radius. The force is whatever is needed to cause the acceleration of the car.

For the power, you could consider one second or one meter of the motion and calculate the work done. I think you will find that you need the velocity (to find the d if you start with a t or vice versa), indicating that the power depends on the velocity. Were you given the maximum speed for the car?