Normal Force Direction
drguildo opened this issue · comments
In section 2.7 it says:
where the object is moving along a surface at an angle, computing the normal force is a bit more complicated because it doesn’t point in the same direction as gravity
but from reading the preceding paragraph it's made to sound like, generally and when there isn't a slope, the normal force would point in the opposite direction to gravity:
The vehicle pushes down against the road with gravity, and Newton’s third law tells us that the road in turn pushes back against the vehicle. That’s the normal force.
I've improved this a little bit (I think).