What forces affect a lawnmower being pushed at a constant speed?

[rachael]

5 A man pushes a lawnmower of mass 20 kg at a
constant speed with a force of 100 N directed along
the handle, which is at 35° to the horizontal.
a What is the horizontal retarding force on the
mower?
b What is the perpendicular reaction of the ground on
the mower?

 

[arildno]

What are your thoughts on this?

 

[rachael]

i don't know
but i tried w=mg
then i applied wsin35
but it was incoorect

 

[neutrino]

Resolve the force the man applies along the axes. What are the other forces acting on the mower?