A block sits on a slope that has an angle of $10$

to the horizontal. There is a coefficient of

static friction $$s $=0\mathrm{.}3$ between the block and the slope. You apply a force to the block in

an attempt to pull it up the hill. Calculate the angle to the horizontal at which you should

apply this force to maximise your chances of being able to make the block move up the

hill.