Calculate Maximum Momentum of Pelle Cycling up a Hill

[Izekid]

Pelle who weights 68 kilos, cycles up a steep hill. He stands up and pushes all his weight on the pedals. Pedals moves in a circle with the radie 18cm. Which is the biggest momentum he can affect the pedals with

Well my answer is wrong but this is how I did
Because I don't know the answer I take

m2= 9,82*(0,18)^2 = 0,318168/6,67*10^-11 = 4770134933
Which is the second mass

M1 = His weight 68kg

Then I take 68*4770134933 =3,24691754^10*-11 * 6,67*10^11 = 21,635424
and then I finely dived it which is 21,635424/0,18^2 = 667,76 N

I get but it's not right answer should be 120Nm please help me !

 

[Päällikkö]

The unit of moment of a force (often called torque) is Nm, and the equation:
$$\mathbf{M} = \mathbf{r} \times \mathbf{F}$$

This problem has little to do with gravitation.